Question

In triangle ABC, angle A=angle C. If exterior angle ABX = 140. Find the angles of triangle ABC

Answer 1

∠ABC =180-140= 40°

∠ABC+ 2∠A=180°

40+ 2∠A= 180

2∠A= 140

∠A=70

THEREFORE ∠C=∠ 70

Answer 2

Answer:

70

Step-by-step explanation:

ABC = 2x

ABX = 140

Therefore , 2x=140

x=70