Question

Prove that sum of all the exterior angles of a triangle is 360degree

Answer 1

Answer:

No answer. It's a proving question.

Step-by-step explanation:

Proof :

let A , B, C be the three interior angles of the triangle.

So , A+B+C= 180° (angle sum property of a triangle)

1st exterior angle = 180-A

2nd exterior angle = 180-B

3rd exterior angle = 180-C

Sum of exterior angles = 180-A + 180-B+180-C = 540 -(A+B+C) = 540 -180 = 360°

Hence proved.