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Find the complement of the given angle $72 °$ .

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28 °

18 °

38 °

20 °

answer is B.

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Detailed Solution

It is given that an angle is

72 °

.
We know that the complementary angles are those whose sum is

900

.
Hence, we can write that,

⇒ 900 − 720

⇒ 180

The complementary angle of

720

180

.
Hence, the correct option is 2.

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