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An angle is its own complement. The measure of the angle is

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30^{o}

45^{o}

90^{o}

60^{o}

answer is B.

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Detailed Solution

Given, an angle is its own complement.
We know that the sum of complementary angles is

90^{o}

.
Let the measure of the required angle be

x^{o}

.
Since, the angle is its own complement, both the angle and its complement will be equal. Then,
⇒

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

⇒

2 x = 90^{o}

⇒

x = {\frac{90}{2}}^{o}

⇒

x = 45^{o}

.
Therefore, the required angle measures

45^{o}

.
Hence, the correct option is 2.

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