POLYGONS
8th grade
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TRIANGLE
QUADRILATERAL
HOW TO FIND THE ANGLE SUM OF OCTAGON
CUT INTO TRIANGLES
The angle sum of triangle is 180°.
Then the angle sum of 2 triangles will be 2 x 180° = 360°
Then the angle sum of 3 triangles will be 3 x 180° = 540°
Then if there is (n-2) triangles, (n-2) x 180 °
Hence…..
No. of triangles in hexagon = 6
Angle sum of triangle = 180°
Angle sum of 4 triangle = 6 x 180 ° = 1080 °
Let’s watch a video to know about the topic
https://youtu.be/Fc7VUv0k5nw?si=F2qCGeooRltxcZt-
Try
me
1.What is the sum of angles of 43 sided polygon ?
2.The sum of the angles of a polygon is 1600 °. How many sides does it have?