What does two adjacent angles whose sum is $180^{0}$ is called?

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Complementary angles

Linear pair

Vertically opposite angles

None

answer is B.

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Detailed Solution

We have been given,
Sum of two adjacent angle =

180^{0}

.
As we know,
The two adjacent angles whose sum is

180^{o}

is known as a linear pair.
Taking an example,

\Rightarrow 70^{o} + 110^{o} = 180^{o}

As their sum is 180o, then the two angles are said to be a linear pair.
Therefore, two such adjacent pairs are known as a linear pair.
Hence, option 2 is correct.

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