Question

In the given figure l parallel to bc.Prove that a+b+c=180 degree

Answer 1

Step-by-step explanation:

We have to prove that a+b+C=180°

A/Q,

angle A+ angle B+ angle C= 180°( angle sum property)

let three angles be x,2 x and 3x

x+ 2x+ 3 x= 180°

6x= 180°

x=180°/6

x=30°,2x=60° and 3x=90°