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What is the supplement of $81^{o}$ ?

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99^{o}

19^{o}

90^{o}

71^{o}

answer is A.

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Detailed Solution

We have been given an angle of

81^{o}

.
We know, the sum of the supplementary angles is

180^{o}

.
Assuming the supplementary angle is ‘x’.
Thus, we can say

\Rightarrow x + 81^{\circ} = 180^{\circ}

\Rightarrow x = 180^{\circ} - 81^{\circ}

\Rightarrow x = 99^{\circ}

Thus, the supplement of

98^{\circ}

99^{\circ}

.
Hence, option 1 is correct.

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