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Q.

The complementary angle of 45° is _______

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a

45^o

b

120°

c

60^o

d

90°

answer is B.

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Detailed Solution

Two angles are called complementary when their measures add to 90 degrees.

i.e. x + 45° = 90°

=> x = 90° - 45°

=> x = 45°

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