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What’s the measure of the complementary angle of $77^{o}$ ?

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43^{o}

70^{o}

47^{o}

13^{o}

answer is D.

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Detailed Solution

We have been given an angle of

77^{o}

.
We know,
The two angles are complementary when they add up to

90^{o} .

We have given,
The measure of one complementary angle is

77^{\circ}

.
Let the other angle be ‘x’.

x + 77^{o} = 90^{o}

x = 90^{o} - 77^{o}

x = 13^{o}

Therefore, the measurement of a complementary angle of

77^{o} is 13^{o}

.
Hence, option 4 is correct.

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