Question

prove that the sum of the three angles of a triangles is 180°

Answer 1

draw a triangle then draw a straight line passing through the upper vertex of the triangle such that it is parallel to the base.
Now the other two slating sides behave as transversals.
The line drawn form a linear pair whose sum is 180 nd the two angle formed by the line nd slanting sides of Triangles are alternating angles as bcoz of parallel lines. Hence it is proved

Answer 2

Hey friend,
The answer to your question is in the pic.

Hope it helps you.
Do Contact me if you need any help
@YHarith #YHarith