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Question

In the given figure, ABCD, ΔAOB and ΔDOC are isosceles triangles

ABO is 32, then BOD is


A

62

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B

31

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C

64

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D

32

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Solution

The correct option is C

64


Given that ABO is 32

BAO=32 (Since ΔAOB is isosceles)

AOB cannot be 32 because AOB must be an obtuse angle

Then AOB=180(32+32)=18064=116

COD=116, (Opposite angles)

BOC=180

BOD+COD=180

BOD=180116=64 (Opposite angles are equal)


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