Question

Question:22*
22. In an isosceles triangle ABC, AB = AC and Angle B = 70° , Find Angle A-----
(A) 40°
(B) 53°
(C) 67°
(D) 70°
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Answer 1

Answer:

AB = AC

Angle B = 70°

Then ,

Angle B = Angle C = 70°

Using Angle Sum Property -

Angle A + Angle B + Angle C = 180°

Angle A + 70° + 70° = 180°

Angle A + 140° = 180°

Angle A = 180° - 140°

Angle A = 40°

Your Answer is Option ( A ) 40°