Let us consider a triangle ∆ ABC
Let ∠ 1 be the exterior angle
Since BAD is a line
∠ A + ∠1 = 180° (Linear Pair)
∠ 1 = 180° − ∠ A
So, in a polygon
Interior angle + Exterior angle = 180°
Last updated at Dec. 16, 2024 by Teachoo
Let us consider a triangle ∆ ABC
Let ∠ 1 be the exterior angle
Since BAD is a line
∠ A + ∠1 = 180° (Linear Pair)
∠ 1 = 180° − ∠ A
So, in a polygon
Interior angle + Exterior angle = 180°
Sum of Exterior Angles of Polygons
Sum of Exterior Angles of Polygons
Example 1
Ex 3.2, 1 (a)
Exterior Angles of Regular Polygons
Ex 3.2, 2 (i)
Example 2 Important
Ex 3.2, 3
Interior Angles of Regular Polygons
Interior Angle of Polygon in terms of Exterior Angle You are here
Ex 3.2, 4 Important
Ex 3.2, 5 (a)
Ex 3.2, 6 (a)
About the Author
Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo