Question

if measure angle A and measure angle B and measure angle b is 60degree and measure angle A and B are linear pair then find measure angle aA

Answer 1

If measure of ∠B=60°
Then, ∠A+∠B=180° (Linear pair)
      ⇒ ∠A+60°=180°
      ⇒ ∠A=180°-60°
      ⇒ ∠A=120°

Answer 2

angle B=60°

angle A+B=180°

angle A+60°=180

angle A=180°-60°

angle A =120 °

answer =120°