Question

Sum of three angle of a triangle 180 degree theorem prove that with diagram maths of class 9

Answer 1

given. a triangle abc
to prove. angle a ➕ b ➕ c=180'
angle 1 ➕ 2 ➕ 3 ➕ =180'
proof. since l / / CD, therefore,
angle 2=4.

Answer 2

Answer:

.....hope it helps a lot mate.....