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In the diagram below ,Delta ABC is...

In the diagram below ,`Delta ABC ` is isosceles and `Delta BCD ` is equilateral . `bar(AB) = bar(BC)` and the measure of `angle ABC ` is half the measure of ` angle BAC .` what is the measure of `angle ABD ` ?

A

`36^@`

B

`60^@`

C

`72^@`

D

`96^@`

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The correct Answer is:
D
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