If the complement of an angle is 20 degrees, then find its supplement.

110 degrees

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100 degrees

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120 degrees

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90 degrees

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Solution

The correct option is A 110 degrees
The sum of two complementary angles = 90 degrees

So, the measure of the angle whose complement measures 20 degrees = (90-20) degrees = 70 degrees

The sum of two supplementary angles = 180 degrees

So, the measure of the supplement of the angle measuring 70 degrees = (180 - 70) degrees = 110 degrees

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