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Question

In the given figure (not drawn to scale), ABCD is a parallelogram, ADF is an isosceles triangle with AD=AF, FAB and EDC are straight lines. Find y.
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A
112
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B
102
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C
132
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D
110
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Solution

The correct option is A 112
FAB and EDC are straight lines, and Df is crossing these lines,
So,
EDF=DFA=34
& ADF is an isosceles triangle with AD=AF
ADF=DFA=34
In triangle AFD,
FAD+ADF+DFA=180
34+34+FAD=180
FAD=112
FAB is straight line and ADBC
So, FAD=y=112
Answer (A) 112

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