Question

1. In a triangle ABC, if ZA + 2B = 65° and ZB + ZC = 140°. then find the measure of ZB.
OR
ABC is a right angled triangle​

Answer 1

Answer:

According to question,

Triangles mcq solution image

Given :

∠A + ∠B = 65°

∠B + ∠C = 140°

We know that

∠A + ∠B + ∠C = 180°

∠C = 180° - (∠A + ∠B)

∠C = 180° - 65°

∠C = 115°

∠B = 140° - 115°

∠B = 25°