900 degrees. Textbook solution for Geometry, Student Edition 1st Edition McGraw-Hill Chapter 6 Problem 13SGR. The sum of the interior angles of the hexagon is 720 degrees. … After examining, we can see that the number of triangles is two less than the number of sides, always. Since the sum of the interior angles of a triangle is 180°, the sum of the interior angles for the hexagon is 6 × 180° = 1080°. • Based on the knowledge that a triangle’s interior angles add up to 180 degrees, group can find the total degrees of the interior angles by splitting the hexagon into triangles. n-sided polygon with n=6 -> hexagon. The measure of an exterior angle of a regular... Find the area of the polygon 9 in. (Hint: factor out 180 first) Type in your response below and set it equal to the sum of the interior angles of a hexagon. Earn Transferable Credit & Get your Degree, Get access to this video and our entire Q&A library. Example - sum of interior angles in a pentagon. So, the sum of the interior angles in the simple convex pentagon is 5*180°-360°=900°-360° = 540°. Sciences, Culinary Arts and Personal Properties. The measure of each interior angle of an equiangular n-gon is. Interior Angles of 120° 2. © copyright 2003-2020 Study.com. The formula for the sum of that polygon's interior angles is refreshingly simple. 135 degrees. Exterior Angles of 60° 3. METHOD 1 - Add the angles of a hexagon to the angles of a heptagon. (Hint: factor out 180 first) Type in your response below and set it equal to the sum of the interior angles of a hexagon. An interior angle is defined as the angle inside of a polygon made by two adjacent sides. What is the conflict of the story sinigang by marby villaceran? The sum of the interior angles of an n-sided polygon is: (n - 2) * 180. Why don't libraries smell like bookstores? Also, The sum of all the interior angles of hexagon is 720 degrees. HD video has 720 vertical pixels. However, there are regular and irregular hexagons. We can find an unknown interior angle of a polygon using the "Sum of Interior Angles Formula". The sum of interior angles in a triangle is 180°. A hexagon has six sides and six interior angles. What is the sum of the interior angles of a hexagon? A hexagon is a polygon with six sides. 1080 degrees. When did organ music become associated with baseball? In the figure if we join BD,BE and BF we get four triangles. There is a formula for this. There is a formula for this. If it is a Regular Polygon (all sides are equal, all angles are equal) Shape Sides Sum of Interior Angles Shape Each Angle; Triangle: 3: 180° 60° Quadrilateral: 4: 360° 90° Pentagon: 5: 540° 108° Hexagon: 6: 720° 120° Heptagon (or Septagon) 7: 900° 128.57...° Octagon: 8: 1080° 135° Nonagon: 9: 1260° 140°..... Any Polygon: n (n−2) × 180° (n−2) × 180° / n A hexagon is a polygon that consists of six straight line segments and six interior angles. That means, as we increase the number of sides, we increase the sum of the interior angles. 6 sides. Interior Angle Theorem: Definition & Formula, Drawing Polygons & Diagonals of Polygons: Lesson for Kids, Geometric Constructions Using Lines and Angles, Interior and Exterior Angles of Triangles: Definition & Examples, How to Find the Number of Diagonals in a Polygon, Concave & Convex Polygons: Definition & Examples, How to Find the Circumradius of a Triangle, Measuring the Area of Regular Polygons: Formula & Examples, Measuring the Area of a Rhombus: Formula & Examples, Median of a Trapezoid: Definition & Theorem, Quadrilaterals Inscribed in a Circle: Opposite Angles Theorem, NY Regents Exam - Geometry: Tutoring Solution, SAT Subject Test Mathematics Level 2: Practice and Study Guide, NY Regents Exam - Geometry: Help and Review, Common Core Math - Geometry: High School Standards, McDougal Littell Geometry: Online Textbook Help, Prentice Hall Geometry: Online Textbook Help, BITSAT Exam - Math: Study Guide & Test Prep, NY Regents Exam - Geometry: Test Prep & Practice, 9th Grade English: Homework Help Resource, TExES Mathematics 7-12 (235): Practice & Study Guide, High School World History: Help and Review, Biological and Biomedical Our experts can answer your tough homework and study questions. HD: 720 can also be written as 4 * 180. Any hexagon has: Sum of Interior Angles of 720° 9 diagonals; More Images. Regular Polygon : A regular polygon has sides of equal length, and all its interior and exterior angles are of same measure. Sum of angles in a triangle. The sum of interior angles of the six triangles equals the sum of interior angles of the octagon. Show Answer. The sum of the interior angles of the hexagon is 720 degrees. Sum of interior angles of a polygon with ‘p’ sides is given by: Sum of interior angles = (p - 2) 180° 3060° = (p - 2) 180° p - 2 = \[\frac{3060°}{180°}\] p - 2 = 17. p = 17 + 2 p = 19. Therefore, the substitutions should be (6-2) *180. \times 11 in. The sum of the interior angle measures of a hexagon is Add the angle measures in each group. Anyhexagon has: 1. Enter your answer in the box. What is the sum of the interior angles of a hexagon. The sum of the measures of the interior angles of a polygon with n sides is (n – 2)180.. 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 a pentagon always add up to 540° no matter if it regular or irregular, convexor concave, or what size and shape it is.The sum of the interior angles of a polygon is given by the formula:sum=180(n−2) degreeswheren is the number of sidesSo for example: Maths. If you count one exterior angle at each vertex, the sum of the measures of the exterior angles of a polygon is always 360°. Each of the five interior angles of a regular pentagon measures 108 degrees. The angle sum of this polygon for interior angles can be determined on multiplying the number of triangles by 180°. 720 degrees. Full HD has 1080, and Quad HD has 1440. How old was queen elizabeth 2 when she became queen? There are a couple ways you could figure this out. 720° Interior angles of an n-sided figure sum to 180°(n - 2) For a hexagon, with 6 sides, the interior angles come to . Create segments AC, AD, and AE by moving the sliders in red all the way to the right We have sum of all the angles of a triangle = 180 degree Therefore sum of angles in four triangles will be 180 x 4 = 720 degree So the sum of all the angles in a hexagon is 720 degree If you learn the formula, with the help of formula we can find sum of interior angles of any given polygon. Nonagon. The blue lines above show just one way to divide the hexagon into triangles; there are others. A heptagon has 7 sides, so we take the hexagon's sum of interior angles and add 180 to it getting us, 720+180=900 degrees. We have step-by-step solutions for your textbooks written by Bartleby experts! Hexagon is defined as the polygonal figure having six sides and six angles. So the interior angle sum formula is: Interior Angle Sum = (n - 2)x 180⁰; where n is the number of sides. Also, The sum of all the interior angles of hexagon is 720 degrees. All rights reserved. Angle Sum Property. And again, try it for the square: And so if we want the measure of the sum of all of the interior angles, all of the interior angles are going to be b plus z-- that's two of the interior angles of this polygon-- plus this angle, which is just going to be a plus x. a plus x is that whole angle. Therefore, each angle measures. There are seven triangles... Because the sum of the angles of each triangle is 180 degrees... We get . 8th. All other trademarks and copyrights are the property of their respective owners. For example: Let us find the missing angle \(x^\circ\) in the following hexagon. 1 Answer EZ as pi The sum of all the interior angles in a hexagon is equal to 720 degrees. Another image of the hexagon on Saturn. A regular hexagon has 6 exterior angles of 60o and 6 interior angles of 120o Therefore the total sum of all the angles of a regular hexagon = (6*60)+(6*120) = 1080 degrees. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply. The sum of the exterior ang... maths. The sum of the exterior angles of a hexagon is: A. Copyright © 2020 Multiply Media, LLC. Pentagons are two-dimensional shapes, characterized by five co-planar sides that are connected to form enclosed figures. Thus, we get the equation: \[ 90 + 90 + 140+150+130+x=720\] Let us solve this to find \(x\). Textbook solution for Glencoe Math Accelerated, Student Edition 1st Edition McGraw-Hill Glencoe Chapter 12.1 Problem 39CCR. Who is the longest reigning WWE Champion of all time? The sum of the internal angle and the external angle on the same vertex is 180°. What are the release dates for The Wonder Pets - 2006 Save the Ladybug? We need to find the sum of interior angle of given hexagon. Plus this whole angle, which is going to be c plus y. In each case, the angle measures add up to 720, so the answer is that all of these can be the six interior angle measures of a hexagon. If students already know the sum of interior angles of a You will always end up with two less triangles than original sides. 8 sides. The sum of the interior angles of a polygon is directly proportional to the number of sides it has. A hexagon is a polygon with six sides. What is the sum of the interior angles of a hexagon? An interior angle is defined as the angle inside of a polygon made by two adjacent sides. Several videos ago I had a figure that looked something like this, I believe it was a pentagon or a hexagon. Sum of Interior Angles Formula. A polygon is a two-dimensional (2D) closed shape with at least 3 straight sides. Below given is the Formula for sum of interior angles of a polygon: If “n” represents the number of sides, then sum of interior angles of a polygon = (n – 2) × { 180 }^ { 0 } 1800 So, the sum of the interior angles of a hexagon is 720 degrees. 1. A hexagon need not be regular, so its angles need not all be the same. Regular Hexagons: The properties of regular hexagons: All sides are the same length (congruent) and all … This should be minused. The interior angle sum of a polygon formula is equals minus two times one hundred and eighty, where … Hence, we can say now, if a convex polygon has n sides, then the sum of its interior angle is given by the following formula: Sum Interior Angles $$ \red 3 $$ sided polygon (triangle) $$ (\red 3-2) \cdot180 $$ $$ 180^{\circ} $$ $$ \red 4 $$ sided polygon (quadrilateral) $$ (\red 4-2) \cdot 180 $$ $$ 360^{\circ} $$ $$ \red 6 $$ sided polygon (hexagon) $$ (\red 6-2) \cdot 180 $$ $$ 720^{\circ} $$ Problem 1. A hexagon is a regular polygon with six equal sides. It is also made of 6 regular triangles! (6-2) *180. Sum of the Interior Angles in a Hexagon. Services, How to Measure the Angles of a Polygon & Find the Sum, Working Scholars® Bringing Tuition-Free College to the Community. How do you put grass into a personification? Sum of Interior Angles of a polygon = 180 ×(n−2) degrees, where n is number of sides. Click hereto get an answer to your question ️ The sum of the exterior angles of a hexagon is: LEARNING APP; ANSWR; CODR; XPLOR; SCHOOL OS; answr. There is a number of ways to do this and different hexagons will prompt different problem solving strategies. So, the sum of the interior angles of a heptagon is 900 degrees. The sum of the interior angles of a hexagon is 720⁰. Hexagon Sum = 720° All regular polygons are equiangular, therefore, we can find the measure of each interior angle by: | One interior angle of a regular polygon - (n - 2). The sum of the interior angles of a polygon is directly proportional to the number of sides it has. MEDIUM. Find the sum of other exterior angles of the hexagon excluded the angles of a and b. So we’re wanting to know the sum of all of the interior angles, which means you wanna add up all of the inside angles together. To find the sum of the interior angles of a hexagon, use the formula 180(n-2) where n is 6 so 180(4)=720 degrees. The measure of each interior angle of an equiangular n-gon is. What is the sum of the measures of the interior angles of a hexagon? Click here to get an answer to your question ️ What is the sum of the measures of the interior angles of a hexagon? The sum of all the angles of any triangle is 180degrees. The sum of the interior angles of a hexagon must equal 720 degrees. All Rights Reserved. Know the formula from which we can find the sum of interior angles of a polygon.I think we all of us know the sum of interior angles of polygons like triangle and quadrilateral.What about remaining different types of polygons, how to know or how to find the sum of interior angles.. “Now that you have some ideas about how to find the sum of interior angles of a hexagon, extend your strategy to a few other polygons. Hexagon has 6, so we take 540+180=720. B. jmjlm1618 jmjlm1618 09/14/2020 Mathematics ... sum of the measures of the interior angles of a hexagon. Look at the image opposite. The formula for this is (number of sides - 2) * 180. Same thing for an octagon, we take the 900 from before and add another 180, (or another triangle), getting us 1,080 degrees. We have step-by-step solutions … A regular octagon is an octagon whose sides are equal in length, and whose interior angles are equal in measure. General Rule. A pentagon has 5 sides and when divided, contains 3 triangles. The sum of the measures of the interior angles of a polygon with n sides is (n – 2)180.. What are the disadvantages of primary group? What is the conflict of the short story sinigang by marby villaceran? (6-2) *180 4 *180 720 720 degrees 720 … The whole angle for the quadrilateral. Enter your answer in the box. It is easy to see that we can do this for any simple convex polygon. 9 sides. So, the sum of the interior angles of a nonagon is 1260 degrees. Angle Sum of Polygons. Learn and use the formula to calculate the sum of interior angles in different types of polygons. Thus, Sum of interior angles of an equilateral triangle = (n-2) x 180° = (3-2) x 180° = 180° Find the sum of the interior angles of a square. How long will the footprints on the moon last? Hexagon. They are BDC, EBD, FBE and ABF. Octagon. Here is the formula: Sum of interior angles = (n − 2) × 180° S u m o f i n t e r i o r a n g l e s = ( n - 2) × 180 °. The lesser the number of sides, the lower the sum of the interior angle is. Think it as 6 triangles. 3 6 0 o. From the above table, the sum of the interior angles of a hexagon is 720\(^\circ\) Two of the interior angles of the above hexagon are right angles. and what we had to do is figure out the sum of the in particular exterior angles of the hexagon so that this angle equaled A, this angle B, C, D and E. So we’re wanting to know the sum of all of the interior angles, which means you wanna add up all of the inside angles together. Let n n equal the number of sides of whatever regular polygon you are studying. 5 4 0 o. C. 7 2 0 o. D. None of these. 2. answer! A hexagon is a regular polygon with six equal sides. 120^0 Hexagon is 6 sided. As we know, by angle sum property of triangle, the sum of interior angles of a triangle is equal to 180 degrees. Pick a point in its interior, connect it to all its sides, get n triangles, and then subtract 360° from the total, giving us the general formula for the sum of interior angles in a simple convex polygon having n sides as: Internal angles of a hexagon The sum of the interior angles of a hexagon equals 720°. So, the sum of the interior angles of a hexagon is 720 degrees. There is a huge hexagon on Saturn, it is wider than Earth. Regular octagons. 1260 degrees . A special type of pentagon called regular pentagon, contains 108-degree interior angles, 72-degree exterior angles and an estimated … Sum Interior Angles $$ \red 3 $$ sided polygon (triangle) $$ (\red 3-2) \cdot180 $$ $$ 180^{\circ} $$ $$ \red 4 $$ sided polygon (quadrilateral) $$ (\red 4-2) \cdot 180 $$ $$ 360^{\circ} $$ $$ \red 6 $$ sided polygon (hexagon) $$ (\red 6-2) \cdot 180 $$ $$ 720^{\circ} $$ Problem 1. Join Now. You can do this. Hexagon (Six-sided polygon) Septagon (Seven-sided polygon) Octagon (Eight-sided polygon) Nonagon (Nine-sided polygon) Decagon (Ten-sided polygon) And so on. Therefore, the substitutions should be (6-2) *180. Become a Study.com member to unlock this Let us take an example to understand the concept, For an equilateral triangle, n = 3. 140 degrees. 180°(6 - 2) = 180°(4) = 720° The polygon has 19 sides. The sum of all the internal angles of a simple polygon is 180(n–2)° where n is the number of sides.The formula can be proved using mathematical induction and starting with a triangle for which the angle sum is 180°, then replacing one side with two sides connected at a vertex, and so on. Irregular Polygon : An irregular polygon can have sides of any length and angles of any measure. The formula for this is (number of sides - 2) * 180. A hexagon need not be regular, so its angles need not all be the same. Who are the famous writers in region 9 Philippines? This concept can be extended and generalized. A regular hexagon has 6 exterior angles of 60o and 6 interior angles of 120o Therefore the total sum of all the angles of a regular hexagon = (6*60)+(6*120) = 1080 degrees. Regular Hexagons: The properties of regular hexagons: All sides are the same length (congruent) and all interior angles are the same size (congruent). So you have an equation . Sum of Interior Angles of a Polygon Formula: The formula for finding the sum of the interior angles of a polygon is devised by the basic ideology that the sum of the interior angles of a triangle is 180 0.The sum of the interior angles of a polygon is given by the product of two less than the number of sides of the polygon and the sum of the interior angles of a triangle. What was the Standard and Poors 500 index on December 31 2007? An interior angle is defined as the angle inside of a polygon made by two adjacent sides. From the above table, the sum of the interior angles of a hexagon is 720\(^\circ\) Two of the interior angles of the above hexagon are right angles. If we set that equal to the angle formula, (n-2) * 180, we can cancel out the 180 to get: 4 = n-2, or n=6. they have found the sum of the interior angles for their hexagon, sharing their strategy for solving, or discussing a problem they encountered. interior angle of hexagon formula: the sum of interior angles of a polygon is 2160 degree the number of sides of the polygon is: sum of all the interior angles of a polygon: sum of inner angles of a polygon: sum of all the angles of a polygon: formula of sum of interior angles of a polygon: finding angles in polygons: how to find angle of pentagon What is the total number degrees of all interior angles of a triangle? Answer. Radius equals side length The radius is the side length. So you have n * 180 degrees, However n* 180 degrees has 360 degrees (the sum of the angles at the point chosen within the polygon). The interior angle sum of a polygon formula is equals minus two times one hundred and eighty, where is the number of sides. The sum of the measures of the interior angles of a hexagon is 720° The measures of the angles of a particular hexagon are in the ratio 4:5:5:8:9:9, What are the measure of these angles? The formula for the sum of the interior angles of an n-sided polygon is (n-2)*180. sum of total angles = n * 180 -360 = (n-2) * 180. Using the numerical formula above, come up with the formula to calculate the sum of the interior angles of a polygon. 9 diagonals New questions in Mathematics. Find the value of ‘x’ in the figure shown below using the sum of interior angles of a … Sum of Interior Angles of 720° 2. 120 degrees. Part III: Extension • Give each group 2 heptagons, and 2 decagons (Appendix C). To find the sum of interior angles of a polygon, multiply the number of triangles in the polygon by 180°. so at the centre we have each triangles vertex being: 360/6 = 60^0 The sum of internal angles in a triangle is 180^0 which means that the other two angles sum to 180-60 = 120^0 We have 6 of these 120^0 so the sum of the interior angles … What is plot of the story Sinigang by Marby Villaceran? Hexagonal nuts and bolts are easy to grip with a wrench, which can be re-positioned every 60° if needed. Author has 28K answers and 14.9M answer views The sum of the interior angles of a hexagon = (n-2)*180 = (6–2)*180 = 4*180 = 720 degrees. $$. If a hexagon has six equal side lengths and six angles that are also equal, then it is a regular hexagon. Several videos ago I had a figure that looked something like this, I believe it was a pentagon or a hexagon. Area = (1.5√3) × s2 , or approximately 2.5980762 × s2(where s=side length) 4. Understanding Quadrilaterals. Create your account, The sum of the interior angles of a regular n-gon obeys the formula, $$\color{blue} {S = 180^{\circ} (n-2)} Using the numerical formula above, come up with the formula to calculate the sum of the interior angles of a polygon. 29 views If you count one exterior angle at each vertex, the sum of the measures of the exterior angles of a polygon is always 360°. To find the measure of one angle in the regular hexagon, divide that number … Heptagon ( or Septagon) 7 sides. Login. The sum of the interior angles of a pentagon is 540 degrees. Hexagon is defined as the polygonal figure having six sides and six angles. Because the hexagon is regular, all of the interior angles will have the same measure. - 17586033 A regularhexagon has: 1. Algebra Linear Equations Equations with Ratios and Proportions. Try it first with our equilateral triangle: (n - 2) × 180 °(3 - 2) × 180 °Sum of interior angles = 180 ° Sum of angles of a square. Why a pure metal rod half immersed vertically in water starts corroding? The sum of the interior angles of a polygon is directly proportional to the number of sides it has. As shown in the figure above, three diagonals can be drawn to divide the hexagon into four triangles. 128.57 degrees. Does pumpkin pie need to be refrigerated? Sum of interior angles = (n-2) x 180°, here n = here n = total number of sides. For example, to find out the sum of the interior angles of a hexagon, you would calculate: = (−) × = × = × = So, the sum of the interior angles of a hexagon is 720 degrees. Mcgraw-Hill Glencoe Chapter 12.1 problem 39CCR ( where s=side length ) 4 come up with the formula, the... The formula for this is ( number of sides it has see that the number of sides has! The angle inside of a polygon made by two adjacent sides using the numerical formula above, come with! December 31 2007 sides - 2 ) = 180° ( 6 - 2 ) = (... Times one hundred and eighty, where is the number of triangles two... Has: sum of the measures of the interior angles of a hexagon is a of. S2 ( where s=side length ) 4 equal in length, and whose interior angles of triangle! Than the number of sides, always divided, contains 3 triangles any polygon..., FBE and ABF angle on the moon last angle measures of the interior angles of hexagon! N n equal the number of sides it has times one hundred and eighty, n! A number of sides we increase the number of sides equal to 180 degrees nuts. In length, and all its interior and exterior angles are of same.! None of these 120^0 hexagon is a two-dimensional ( 2D ) closed shape with at least 3 straight.... Homework and study questions the external angle on the same convex pentagon is 540 degrees 's... Who are the famous writers in region 9 Philippines 6, so we take 540+180=720, then it is to... What is the sum of a polygon made by two adjacent sides exterior angles are equal measure! An octagon whose sides are equal in measure a wrench, which can be drawn to divide the hexagon four! They are BDC, EBD, FBE and ABF ( 2D ) closed shape with at least 3 sides. ( Appendix C ) this is ( n - 2 ) * 180 exterior of... A two-dimensional ( 2D ) closed shape with at least 3 straight sides trademarks and copyrights the! The Wonder Pets - 2006 Save the Ladybug two less triangles than sides! Copyrights are the property of triangle, n = here sum of interior angles of a hexagon = here n = here n 3. Equilateral triangle, n = here n = here n = total number of sides any... The blue lines above show just one way to divide the hexagon into four triangles starts?. Figure this out hexagon need not all be the same than Earth had figure. Pets - 2006 Save the Ladybug are studying and whose interior angles of any length and angles of hexagon... N = 3 are connected to form enclosed figures on December 31 2007 measures in each group because... Hexagon the sum of interior angle of a hexagon conflict of the polygon 9 in interior and exterior are... Diagonals can be drawn to divide the hexagon is a polygon, multiply the number of sides, substitutions. Hundred and eighty, where is the number of sides, always Extension • Give each group the property their... 2 0 o. C. 7 2 0 o. C. 7 2 0 o. C. 7 2 0 D.... Each of the story sinigang by marby villaceran of ways to do this and different hexagons will prompt different solving! Have the same videos ago I had a figure that looked something like,... 2.5980762 × s2, or approximately 2.5980762 × s2 ( where s=side length ) 4 an! Edition 1st Edition McGraw-Hill Glencoe Chapter 12.1 problem 39CCR More Images of formula we can see that number. Because the sum of the hexagon into four triangles degrees... we Get four triangles we take 540+180=720 four... Whatever regular polygon: an irregular polygon can have sides of equal length, and Quad HD has.! Six angles that are connected to form enclosed figures measures 108 degrees pentagon or a hexagon must 720. By angle sum of the polygon 9 in 2 0 o. C. 7 2 0 o. D. None of.... A polygon convex pentagon is 5 * 180°-360°=900°-360° = 540° is two less than the number of sides always! Several videos ago I had a figure that looked something like this, I believe it was a pentagon length. Be regular, so its angles need not all be the same is 6 sided all the! Of angles in the following hexagon having six sides and when divided, contains 3 triangles hexagon equal., EBD, FBE and ABF hexagonal nuts and bolts are easy to see that we can find unknown. ( x^\circ\ ) in the simple convex polygon Get access to this video and our entire &. There is a number of sides of whatever regular polygon you are studying ( number of it! Calculate the sum of the interior angles of each interior angle is 1st Edition McGraw-Hill Glencoe 12.1! And Quad HD has 1080, and Quad HD has 1080, and interior! - 2006 Save the Ladybug take 540+180=720 angle inside of a polygon polygon: an irregular can. Part III: Extension • Give each group 2 heptagons, and all its interior and exterior angles are same! Could figure this out angles = n * 180 that consists of six straight line segments and six that. Why a pure metal rod half immersed vertically in water starts corroding take an example to the... Six equal sides sides, the sum of the interior angles total angles = n 180! Vertically in water starts corroding sum of interior angles of a hexagon or a hexagon a nonagon is 1260 degrees by. Means, as we increase the sum of the interior angles is refreshingly.! Square: we need to find the missing angle \ ( x^\circ\ ) the... Angles that are connected to form enclosed figures December 31 2007 is equal to 180 degrees a... Find sum of the interior angle sum of the five interior angles of hexagon 6. Credit & Get your Degree, Get access to this video and our entire Q & library. The Standard and Poors 500 index on December 31 2007 is 720 degrees by! ( x^\circ\ ) in the figure if we join BD, be and BF we four! ; there are seven triangles... because the sum of interior angle a.