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Linear Pair

Find the valu...

Question

Find the value of $∠$ COB.

A

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B

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C

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D

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Solution

The correct option is C

Two angles are called supplementary angles, when they add up to $180^{\circ}$ .

$∠$ COA + $∠$ COB = $180^{\circ}$ (linear pair)

$30^{\circ}$ + $∠$ COB = $180^{\circ}$

$∠$ COB = $150^{\circ}$

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