Question

AB = AC If the measure of Angle B is twice the measure of Angle A, then find the measure of all the angles.​

Answer 1

Answer:

We can therefore write this equation for the angles: x+x/2 + x/2=180

2x=180

x=90.

x/2=B=C=45

The exterior angle at C = 180-45=135

The answer is therefore B.

Answer 2

If AB = AC then

angle B is equal to angle C

angle A = x

angle B = 2x

angle C = 2x

total sum of all angles in a triangle = 180°

x + 2x + 2x = 180°

5x = 180

x = 180/5

x = 36°

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angle A = 36°

angle B = 2(36) = 72°

angle C = 2(36) = 72°

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