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Question

The measure of angle which is equal to its supplement is


A

100

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B

90

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C

120

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D

40

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Solution

The correct option is B

90


We know that,

If 2 angles are supplementary, their sum is 180.

Let one of the angle be x

Then another angle is also x( They are equal).

x+x=180

2x=180

x=90


Mathematics

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