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Question
The measure of the angle is given below. Write the measure of the complementary angle.
40°
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Solution
Let the measure of the complementary angle be a.
∴ 40° + a = 90°
∴ 40° + a − 40° = 90° − 40° ...(Subtracting 40 from both sides)
∴ a = 50°
Hence, the measure of the complement of an angle of measure 40° is 50°.
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