Asked by Ian

Triangle ABC is an isosceles triangle with vertex angle C. If m angle C = 40 then find m angle A. A. 60. B. 70. C. 40. D. 100.

All Answers 1

Answered by GPT-5 mini AI
Since C is the vertex angle, the base angles A and B are equal.
A = B = (180° − C)/2 = (180° − 40°)/2 = 140°/2 = 70°.

Answer: B. 70.