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# Octagon angles

A regular octagon has: Interior Angles of 135° Exterior Angles of 45° Area = 2 (1+√2)s2, or approximately 4.828427 × s2 (where s=side length) Width w = (1+√2) Regular octagons Since each of the eight interior angles in a regular octagon are equal in measure, each interior angle measures... Each exterior angle for a regular octagon has an equal measure. The exterior angles of a regular octagon have an angle... Sides of a regular octagon are equal in.

### Octagon - MAT

• In regular octagon, sum on interior angles of an octagon is 1080°, where each angle is equal to 135° (that means 135×8 = 1080). The sum of exterior angles of an octagon is 360°. Each exterior angle measure 45° which means 45×8 = 135
• The sum of the interior angles of an octagon is 1080 ° The sum of the exterior angles of an octagon is 360 ° A regular octagon has 20 diagonals. Regular octagons are always convex octagons, while irregular octagons can either be concave or convex
• For an octagon, the calculated angle is 45 degrees, and 22.5 degrees will be added or subtracted from each side of the stock. Your table saw normally is set at 90 degrees, or perpendicular to the top
• This means that a regular octagon will have internal octagon angles of exactly 1080°/8 = 135° (if you prefer other units, feel free to use our angle converter). In our opinion, a regular octagon is much prettier than all other octagons
• Each length of wood must be cut to a 22.5-degree angle at each end. If you are using a tabletop miter saw, it will almost certainly have a setting for this angle
• An octagon is a polygon that has eight sides. Generally, when most people think of the word octagon, they're thinking of a regular octagon - one that has both sides and angles of the same size (like the shape of most stop signs)

### Octagon - Mat

1. Set your miter saw at 22.5 degrees. This is the angle you need to cut at to make an octagon shape
2. How to cut an octagon on a miter saw - YouTube. TL5571 emanuelle v1 VINCE 5 TIPS+squats+belly fat. Watch later. Share. Copy link. Info. Shopping. Tap to unmute. If playback doesn't begin shortly.
3. Properties of Octagon These have eight sides and eight angles. All the sides and all the angles are equal, respectively. There is a total of 20 diagonals in a regular octagon. The total sum of the interior angles is 1080°, where each angle is equal to 135° (135×8 = 1080) Sum of all the exterior. About Octagon. Who we are A plan with eight straight sides and angles - that makes the name OCTAGON. Product Quality, Price, Service, Partner, Profit, Progress, Possibility and Pioneer-this eight points are viewed by our management from their advance philosophy An octagon refers to a polygon in geometry having 8 sides and 8 angles. Thus, as it has got 8 sides and angles, the vertices and the number of edges will also be 8. All these sides join together with one another in order to create a shape. Let us learn more about it In this case, 6 x 180 = 1080; an octagon's internal angles add up to 1080 degrees. You can do this with any convex polygon, and by convex , I mean that all the internal angles are less than 180 degrees An octagon has an interior angle sum of 1,080 degrees. All of the angles are equal in a regular octagon, so we need to divide 1,080 by 8 angles: 1,080 / 8 = 135

### Octagon: Shape, Sides, Angles, Meaning, Formula, Radiu

• In this clip learn how to calculate the sum of interior angles of a octagon.To calculate the sum of the interior angles the following formula is used ((n-2)1..
• d gazebos when I wrote it. It's written in HTML and Javascript
• No, an octagon has no right angles of 90°. That's because each interior angle of the octagon is 135° while these interior angles are collectively 1080°. On the other hand, each exterior angle of the octagon is 45° while exterior angles of the octagon are collectively 360°
• Properties of Octagon These have eight sides and eight angles. All the sides and all the angles are equal, respectively. There is a total of 20 diagonals in a regular octagon. Sum of all the exterior angles of the octagon is 360°, and each angle is 45°(45×8=360). Are all angles in an octagon equal
• A regular octagon is a geometric shape with 8 equal lengths and 8 equal angles. The sum of the interior angles of a regular octagon is 1080 degrees, which makes each angle equal to 135 degrees in measure. Area of a regular octagon: One can think of the regular octagon as a square with corners that have been cut off or shortened
• Constructing a wooden octagon planter requires cutting precise 22 1/2-degree angles at the ends of the boards that will form the planter's eight sides. That task would be nearly impossible when estimating the angles while cutting the boards, but a miter saw can be set to the exact angle to make a perfect cut each time

### Octagon - Shape, Types, Properties, Formulas and Example

An Interior Angle is an angle inside a shape. Example: Pentagon. A pentagon has 5 sides, and can be made from three triangles, so you know what.. its interior angles add up to 3 × 180° = 540° And when it is regular (all angles the same), then each angle is 540° / 5 = 108° (Exercise: make sure each triangle here adds up to 180°, and check that the pentagon's interior angles add up. You may wonder, when to finish the quilts in these unusual angles? Here are a few examples, just keep in mind that the final shape of the quilt must be in harmony with the design. What I mean is, if you have a mandala design with 6 wedges/repeats, you can't finish it as an octagon with 8 sides

A regular octagon, that is, one in which the lengths of the sides are equal, and the angles are all 135°. From Latin octagōnon , octōgōnon ( octagon ) , and from its etymon Ancient Greek ὀκτάγωνον ( oktágōnon , octagon ) , probably from Koine Greek ὀκτάγωνος ( oktágōnos , having eight corners ) + -ον ( -on , suffix forming nouns ) That means that if you add up all the angles in those six triangles you ll get the total internal angle sum of the octagon. Sum interior angles number of sides 2 180 8 2 180 1080 the sum of the interior angles of an octagon is 1080 in a regular octagon divide by 8 for each angle 135 An octagon has eight straight sides and eight vertices (corners). It has eight angles inside it that add up to 1080°. If you see a word that begins with oct, it often has a meaning to do with the number eight. For example, an octopus has eight legs To have an easy way to calculate the sum of all interior angles of a polygon try to think what is smallest polygon. The answer is the triangle with internal angle sum of 180 degrees. So the second step think about what is the smallest number of tr..

Construct, not measure. Diagonals of the octagon would be separated by (constructable) angles of 45 degrees. Etc. 4. Construct a regular octagon given the perpendicular distance from one side of the octagon to the opposite (i.e. twice the radius of the inscribed circle). Build a square around the circle and construct the octagon from that. 5 An octagon, like any other polygon, can be either convex or concave, as illustrated in the next figure. A convex octagon has none of its interior angles greater than 180°. To the contrary, a concave octagon (or polygon) has one or more of its interior angles greater than 180°

### Angles to Cut Octagonal Pieces - Woodworking Blog

1. Template:Otheruses In geometry, an octagon is a polygon that has eight sides. A regular octagon is represented by the Schläfli symbol {8}. 1 Regular octagons 2 Uses of octagons 3 Derived figures 3.1 Petrie polygons 4 See also 5 External links A regular octagon is always an octagon whose sides are all the same length and whose internal angles are all the same size. The internal angle at each.
2. Octagon Calculator. Calculations at a regular octagon, a polygon with 8 vertices. This form is familiar from being used as stop sign. Enter one value and choose the number of decimal places
3. The interior angles of ANY polygon always add up to a constant value, which depends only on the number of sides. For example the interior angles of an octagon always add up to 1080° no matter if it is regular or irregular, convex or concave, or what size and shape it is
4. Octagon is a polygon with eight straight sides and angles, a geometric shape on the two dimensional plane. K-12 students may refer the below formulas to know what are all the input parameters are being used to find the area, perimeter & side of octagon. Octagon formulas to calculate area, perimeter & sid
5. Octagon Calculator. A very simple and easy to use calculator for calculating the sides on an octagon. Perfect if you for example want to build your own poker table. Just enter one side and the rest of them will be calculated so you have the whole layout
6. Octagon with a 2 right angle could look like a square with a barn-like roof. Or a diamond with the opposite corners trimmed. The others are talking about Regular Octagons. 1 0. Anonymous. 1 decade ago
7. The word 'Octagon' has been derived from the Greek word 'ὀκτάγωνον' (oktágōnon) which means eight angles. This is how the shape with eight angles was named Octagon. During the 1850s and 1900s, many people started building their homes in the shape of an octagon as it is a symbol that represents rebirth, infinity, regeneration, and transition

Fact #2, the internal angle of each triangle -- eg, the angle FZG -- will be one-eighth of a full circle; ie, 360° / 8 = 45° has been proven. By inspection, we see that the octagon is divided into eight isoceles triangles. Each triangle has the same angles and the same length sides. Therefore, they are 8 identical triangles The total interior angles of an octagon = 1080° Each time we add a side (triangle to square, square to pentagon, pentagon to hexagon) we add another 180° The sum of the interior angles of a regular octagon is 1080 degrees. Since each of the eight interior angles in a regular octagon are equal in measure each interior angle measures 1080 8 135 as shown below. 180 x 2 135 interior angle sum theorem x 2 75 x 2 75 that can t be right though. An octagon s internal angles add up to 1080 degrees An octagon is a geometrical shape that contains eight sides and eight angles. Octagons must have straight sides that connect; they cannot be curved or disconnected. You will often see octagons in.

### Octagon Calculator Shape Definitio

1. Octagon. In geometry, an octagon (from the Greek ὀκτάγωνον oktágōnon, eight angles). Is an eight-sided polygon or 8-ton. A regular octagon has Schläfli symbol {8} and can also be constructed as a quasiregular truncated square, t{4}, which alternates two types of edges
2. All sides are the same length (congruent) and all interior angles are the same size (congruent). To find the measure of the angles, we know that the sum of all the angles is 1080 degrees (from above) And there are eight angles So, the measure of the interior angle of a regular octagon is 135 degrees
3. The regular hexagon has Dih 6 symmetry, order 12. There are three dihedral subgroups: Dih 3, Dih 2, and Dih 1, and four cyclic subgroups: Z 6, Z 3, Z 2, and Z 1.. These symmetries express nine distinct symmetries of a regular hexagon. John Conway labels these by a letter and group order. r12 is full symmetry, and a1 is no symmetry.p6, an isogonal hexagon constructed by three mirrors can.

The angles in a triangle (a 3-sided polygon) total 180 degrees. The angles in a quadrilateral (a 4-sided polygon) total 360 degrees. The angles in a pentagon (a 5-sided polygon) total 540 degrees. The angles in a hexagon (a 6-sided polygon) total 720 degrees. The angles in an octagon (an 8-sided. An octagon ritual structure, when it is fully formulated, also contains two opposing pyramid structures, causing a polarity to be generated between them. Still, we should examine the ritual structure of the power octagon, we will talk about the use of the four Watchtowers and their in between points, the four Angles Find the sum of the measures of the interior angles in an octagon. The octagon has 8 sides and we plug this value into our formula: S = 180(8 - 2) = 1080° Hence the sum of the measures of the interior angles in an octagon is 1080°. Another thing with convex polygons is that the sum of the measures of the exterior angles is always 360� Problem. Regular octagon has area .Let be the area of quadrilateral .What is . Solution 1. is a square. WLOG then using Law of Cosines, The area of the octagon is just plus the area of the four congruent (by symmetry) isosceles triangles, all an angle of in between two sides of length 1. Now, The answer is Solution 2. Refer to the diagram. Call one of the side lengths of the square

The angles A 1 and A 3 are important when setting up a table saw to make an object involving the shape of a regular polygon. They are listed in Table 1 for some frequently encountered n-gons: the square, pentagon, hexagon, and octagon. Table 1. Angles for selected -gons central angle internal angle A 3 4 90 90 45 45 5 72 108 36 54 6 60 120 30. Octagon Layout Calculator WHAT IS IT? It's a carpenter's aid for laying out a perfect octagon. Seeing as it's tolerance is to the nearest 1/16, it's no good for small projects such as jewlery boxes. The Octagon Layout Calculator is a handy carpenter's tool for laying out a perfect octagon. Use it to calculate your gazebo layout. Very simple to. regular octagon 8 135° regular nonagon 9 140° regular decagon 10 144° Sum of Interior angles of regular n-sided polygons is 180(n-2)°. To find the interior angle, divide this amount by the number of sides, n. Straight line = 180° Reflex angle > 180° b c . Free Math Sheets, Math Games and Math Help If you mean a regular octagon, then yes each interior angle is 135 degrees. One way to check this is all the exterior angles will total to 360 degrees. 360/8 = 45 degrees. Since the exterior angles and the interior angles are supplementary, add to..

Answer: The sum of the interior angles of a heptagon (7-sided) is 900°. Example: Find the interior angle of a regular octagon. Solution: Step 1: Write down the formula . Step 2: Plug in the values to get . Answer: Each interior angle of an octagon (8-sided) is 135° If the 8 sides of the octagon are equal in length and the angles between these sides are equal, the octagon is called a regular octagon. In a regular octagon, the measure of each of the interior angle is 135 degrees. The exterior angles measure 45 degrees each. In this section, you will learn how to calculate the area of an octagon The Angles Octagon font contains 99 beautifully designed characters. ️ Customize your own preview on FFonts.net to make sure it`s the right one for your designs

Angle POQ then has measure 360 / 8 = 45 degrees. Since POQ is isosceles, angles OQP and QPO are equal. But the sum of the angles in a triangle is 180 degrees and thus. Angle QPO = (180 - 45) / 2 = 67.5 degrees. Thus, if you cut each 2 by 6 at an angle of 67.5 degrees they will fit together to form a regular octagon Download the Angles Octagon font by Rick Mueller. The Angles Octagon font has been downloaded 44,494 times Cutting Octagon Angles On A Table Saw 1. Woodworking Shop Safety 10 Safety Tips to Post in Your Shop 1) Think Before You Cut - The most powerful tool in your shop is your brain, use it. Thinking your cuts and movements through before acting can help save both fingers and scrapwood How To Draw An Octagon, Octagon Drawing, Octagon Steps, Octagon Square, Octagon Geometry, Octagon Polygon, Octagon Graph Paper, Area of Octagon, Octagon Dimensions, How Do You Draw a Octagon, Origami Octagon, How to Draw a Octagon Shape, Octagon Layout, How to Draw a Octagonal Prism, How to Make an Octagon, 8 Sided Shape Octagon, Octagon Pattern, Octagon Line Drawing, Regular Octagon, Octagon. Download free font Angles Octagon by Rick Mueller from category 3

### The Degree at Which to Cut an Octagon From Wood Home

• An octagonal window can add a unique detail to a room, entry or hallway, and provide a beautiful glass element to your decor. Applying the interior and exterior trim is the final touch. Ensuring a professional finish is a matter of accurate measurements and cutting of the angles
• The next step in these octagon picnic table plans is the leg bases and seat supports. The leg bases are made from the pressure treated 2×8. Each of these bases is just a 23 1/2″ piece, with the outside corners cut off at 45° angles for visual effect. You will attach these to the legs using three 3″ exterior wood screws per leg
• An octagon forms eight interior isosceles triangles with vertex angles (the ones closest to the center) that each measure 45 degrees. Since the sides of these triangles match one another, their base angles have to match, too. And, we know that the interior angles of a triangle add up to 180 degrees

$6$ right angles can be achieved, as in the diagram below: If there were seven right angles, these would be a total of $7 \times 90^\circ = 630^\circ$. The total interior angle of an octagon is $6 \times 180^\circ = 1080^\circ$, so the final angle would have to be $1080^\circ - 630^\circ = 450^\circ$ Octagon definition, a polygon having eight angles and eight sides. See more Angle Clamp Set 45º Angle (octagon) The Angle clamp Set helps you to glue perfect angles. You can connect sheets that are up to 10 cm / 4 inch high. The set contains 4 clamps to speed up your build. To lock your project into place use gummy bands or small clamps as seen in the picture MILLETT ANGLE-LOC STEEL TWO PIECE BASES CVA Octagon Smooth Base. These two-piece bases are the perfect match for our very popular Angle-Loc™ rings. Millett two-piece steel bases are 30 to 50 percent lighter than other brands Octagon: Octàgon regular. En geometria, un octàgon és un polígon amb vuit costats i vuit angles. L'etimologia del nom prové del grec octo- (vuit) i gonia (angles). Un octàgon té 20 diagonals i la suma de tots els angles interiors és 1080 graus o Els costats s'uneixen formant un angle de 135º o.

Octagón Real, Ciudad de México. 102,741 likes · 404 talking about this. PÁGINA OFICIAL DE OCTAGÓN. LUCHADOR PROFESIONAL IDOLO Y LEYENDA(Administrada Por.. The formula for calculating the sum of interior angles is: $$(n - 2) \times 180^\circ$$ (where $$n$$ is the number of sides) Question. Calculate the sum of interior angles in an octagon. Reveal answe Free octagon loop cycle for PowerPoint and Google Slides. A clear and colorful design of an octagon with looping angles. Editable graphics with icons and text placeholders. Octagon Loop Cycle. Do you want to share the steps of your process with your colleagues and clients Learn how to use a formula to find out the internal angles within a polygon. Polygons are 2D shapes that have straight sides. Regular polygons have sides and angles that are all the same size. Let.

When looking for the 8 angle pairs in the first concave octagon, one of the interior angles (H), seems to be found on the inside of the octagon. Furthermore, the interior angle (H) is greater than 180 o, which results in a sum greater than 180 o for this angle pair Since an octagon has eight sides, subtract two from eight to get six. Multiply six by 180 to find the total number of degrees in an octagon equals 1,080. Divide 1,080 by eight to find the measure of each interior angle if the octagon is regular . In a regular octagon , each angle measures 135 degrees Octagon. Octagons have 8 sides so again, we need to adjust the formula accordingly: sum of internal angles = (8 - 2) x 180°. 1080° = 6 x 180°. In a regular octagon, one angle would be worth.

An octagon has 8 sides, so we This is the sum of all the angles in a regular octagon, and since an octagon has 8 angles, we divide by 8 to find the measure of one angle. To see more answers head over to College Study Guide At this point, you should have a perfect 135 degree angle between any two walls. To dimension the plan Select CAD> Dimension> Automatic Exterior Dimensions , then select Window> Fill Window inner angle of hexagon: 720 / 6 = 120 inner angle octagon: 1080 / 8 = 135 angle of x: 360 - (135 + 120) = 105 x = 105 In case you don't understand. all the angles around a point add up to 360. So you take off the other 2 angles from 360. Working out the inner angles from regular shapes is easy you can just google it. thats where 255 comes from Example equiangular polygons with 90° Direct Indirect Skew A rectangle is a convex direct equiangular polygon, containing four 90° internal angles.: A concave indirect equiangular polyagon, like this hexagon mixes five right turns and one left turn, like this tetromino.: A skew polygon has equal angles off a plane, like this skew octagon alternating red and blue edges on a cube The Octagon House in Watertown, Wisconsin, in 1856. (Library of Congress) In his 2015 book The Vegetarian Crusade, Adam Shrpintzen writes, Colonists were required to sign an oath promising to abstain from intoxicating liquors, tobacco, and animal flesh as a precondition of residency. As Clubb began to draft the plans, he drew inspiration from Orson Squire Fowler, who himself was a member.

All Octagon Segments are made from 5 1/2 Wide by 1 1/2 Thick wood. The Top Trim segments are also made from 1 1/2 Thick wood. The finished dimensions of the Top Trim segments are 23 5/8 long, 1 wide, and 1 1/2 high. 67.5° All angles for the Octagon Segments and Trim Segments are 67.5 degrees 82 Free images of Octagon Related Images: stop stop sign pattern puglia octagonal solihull sign red architecture octagon 149 101 2 Octagon is an Amazing Shape that has 8 Fantastic Sides, and 8 Awesome Angles, here, let me show you! ����� ### 4 Ways to Make an Octagon - wikiHo

A quadrilateral can have four right angles. What is the largest number of right angles an octagon (8 sides) can have? If you liked this problem, here is an NRICH task which challenges you to use similar mathematical ideas Then my son Brian explained to them that the octagon hip rafter rafters are not at the common rafter pitch and their not at the 90° eave angle hip rafter slope. He told them how to calculate the octagon hip rafters the old fashion way. Use the rise and the hip rafter run to calculate the octagon hip rafter slope angle The interior angles for an octagon is 135 degrees each to equal up yo 1080 degrees.Each octagon has to equal up to 1080 degrees Irregular Octagon: If octagon sides and angles are unequal, it is called an irregular octagon. Properties of a Regular Octagon. Following are the features of a regular octagon. It comprises 8 sides and 8 angles. The measurement of each side is equal, as is the case with its angles. A regular octagon comprises a total of 20 diagonals Each corner of the square should be the center of one of the circles. The radius length should be equal half the length of one of the diagonals. 4.) Construct a point every where the circles intersect the original square. Connecting these points will make up your octagon. 5.   ### How to Make an Octagon Jig - Building Geometric Shapes

Method 1. The sum of exterior angles is 360°. The exterior angle is \ (360 \div 5 = 72^\circ\). The interior and exterior angles add up to 180°. The interior angle is \ (180 - 72 = 108^\circ. The top of this octagon picnic table starts with eight pieces of non-pressure treated 2×6 cut to 27″ on the long side. Each end should be cut at a 67 1/2° angle, so when the pieces are all assembled you get the outer frame of your octagon. Since you are cutting eight of these that need to be the same, I recommend gang cutting two at a time English Language Learners Definition of octagon. mathematics : a flat shape that has eight sides and eight angles. See the full definition for octagon in the English Language Learners Dictionary  ### How to cut an octagon on a miter saw - YouTub

An octagon forms eight interior isosceles triangles with vertex angles (the ones closest to the center) that each measure 45 degrees. Since the sides of these triangles match one another, their base angles have to match, too. And, we know that the interior angles of a triangle add up to 180 degrees Download free angles octagon font, view its character map and generate text-based images or logos with angles octagon font online This 'Octagon Loop Cycle for PowerPoint and Google Slides' features: 2 unique slides; Light and Dark layout; Ready to use template with icons and text placeholders; Completely editable shapes; Uses a selection of editable PowerPoint icons; Standard (4:3) and Widescreen (16:9) aspect ratios; PPTX file and for Google Slides; Free fonts used Octagonal definition, having eight angles and eight sides. See more The interior angles of a polygon are those angles at each vertex that are on the inside of the polygon. There is one per vertex. So for a polygon with N sides, there are N vertices and N interior angles. For a regular polygon, by definition, all the interior angles are the same.In the figure above, Click on make regular then change the number of sides and resize the polygon by dragging any.

One interior angle of a regular polygon - (n - 2). 180° ~ [ Sum of all angles For a hexagon: 720° One interior angle = - 120° 6 Note: The previous information could also be used to find the number of sides for a regular polygon given the measure of one interior angle. Example: How many sides does a regular polygon have if one interior angle Name: Exam Style Questions Ensure you have: Pencil, pen, ruler, protractor, pair of compasses and eraser You may use tracing paper if needed Guidanc

### Home Octago

The silent fans make the Octagon Theatre a power-saving replacement for halogen spotlights, particularly suitable for theatres, musicals, variety shows etc. With the continuous adjustable colour temperature of 2800 - 6400 Kelvin and the extension in the pastel white range by the amber colour LED, the Octagon Theatre plays in a whole new league of spotlight The central angle for an Octagon roof is 45°. One half of 45° is 22.5°. The tangent of 22.5° = .41421 Laying out an Octagon using a framing square we would take 12 on the blade and the number to be taken on the tongue is 12 * .41421, which is 4.97 , or nearly 5 All angles of an octagon must add up to 1080 degrees. A regular octagon has all equal angles, which are all 135 degrees. Other angles are possible though Example In this example, we have an octagon of which we want to find the interior and exterior angle. We will use the formulas from above to do so! To find the interior angle we need to substitute an 8 into the formula since we are dealing with an octagon: i = 8 - 2 x 180° i = 1080° To find the individual angles of this regular octagon, we just divide the sum of interior angles by 8 FanPost edited and promoted by MMAmania.com. The UFC Octagon is a staple of combat sports. Mixed martial arts (MMA) has seen many variations of the famed cage along with use of the boxing ring format  ### Octagon: Polygons, Types of Octagon, Properties and Example

Octagon: In geometry, the octagon is a polygon that has 8 sides and 8 angles. This means octagon has How to Make an Octagon Wood Planter. Add an element of geometry to your landscape with an octagon wood planter. The straight edges and wide-angled corners of an octagon planter complement the.

Convex case. In the case of convex polygons, where all the vertices point outwards away form the interior, the exterior angles are always on the outside of the polygon.In the figure above, check regular and notice that this is the case. Although there are two possible exterior angles at each vertex (see note below) we usually only consider one per vertex, selecting the ones that all go. we already know that the sum of the interior angles of a triangle add up to 180 degrees so the measure of this angle is a the measure of this angle over here is B and the measure of this angle is C we know that a plus B plus C is equal to 180 degrees but what happens when we have polygons with more than three sides so let's try the case where we have a four-sided polygon a quadrilateral and I. Find the sum of the measures of the interior angles of an octagon. Solution: An octagon has 8 sides. So, n = 8 . Substitute 8 for n in the formula. The sum of the measures of the interior angles of an octagon = ( 8 − 2 ) 180 ° You can tell, just by looking at the picture, that $$\angle A and \angle B$$ are not congruent. The moral of this story- While you can use our formula to find the sum of the interior angles of any polygon (regular or not), you can not use this page's formula for a single angle measure--except when the polygon is regular OCTAGON Meaning: a plane figure having eight angles and eight sides, 1650s, from Latin octagonos, from Greek oktagōnos, See definitions of octagon

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