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Question

The sum of an angle and half of its complementary angle is 75°. The measure of the angle is
(a) 40°
(b) 50°
(c) 60°
(d) 80°

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Solution

Let the required angle be x.
Now, complementnary of the required angle = 90− x
Then,
x+1290°-x=75°2x+90°-x=150°x=150-90°x=60°
Hence, the correct answer is option (c).

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