If an angle is its own complementary angle, then its measure is _________.

30^{o}

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45^{o}

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60^{o}

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90^{o}

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Solution

The correct option is A $45^{o}$
Let the angle be $X$
It is given that $X$ is its own complementary angle.
$\Rightarrow X + X = 90^{\circ}$
$\Rightarrow 2 X = 90^{\circ}$
$\Rightarrow X = 45^{\circ}$
Answer is $45^{\circ}$
Option B is correct.

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