Question

In the following figure, find the measure of angle y.​

Answer 1

In triangle ABD

AB = BF

Therefore, Angle DAB = Angle BDA = y

Angle ABC = 60° (Angle of equilateral)

Angle ABC is exterior angle for angle ABF

Hence, y + y = 60°

2y = 60°

y = 60/2

y = 30°

Answer 2

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