Question

In an isosceles triangle ABC, AB=AC. If angle B=75º, then the measure of angle A will be

Answer 1

Answer:

in isosceles triangle

AB = AC

75 + 75 + angle A = 180

150 + angle A = 180

angle A = 180 - 150

angle A = 30 °

Answer 2

Answer:

Angle A=30°

Step-by-step explanation:

AB=AC(given)

Therefore, angle B =C = 75°

Therefore, 75°+75°+ angle A = 180°(angle sum property)

Therefore, angle A= 180°-150°=30°

Thus, angle A = 30°

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