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Question

In the adjoining figure find the measure of BAC ifABD=CAD and BAD=ACD

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A
1200
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B
600
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C
750
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D
900
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Solution

The correct option is D 900
Let, BAD=ACD=x
and ABD=CAD=y
Now, C+A+B=180°
x+(x+y)+y=180°
x+y=90°
also, A=BAC=BAD+CAD=x+y
So, BAC=90°

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