Question

1. Prove that the sum of three angles of a triangle is 180°​

Answer 1

angles of triangle = 180 degrees

so all the sides of the triangle will be xcm

=> x+x+x=180

=>3x=180

=>x=180/3

=>x=60 degrees

so now if we will add 60 three times then the sum will be 180 degrees

Answer 2

see the attachment mate.

hope it helps