If the complement of a certain angle is four times the measure of that certain angle, then what is the measure of that certain angle? Choose the most appropriate option:
A) 45°  B) 30°  C) 22.5°  D) 18°  E) 15°
Thecomplementof angle A is the angle which, when added to angle A, gives 90 degrees. The two acute angles of a right triangle are complements, for example.   The original angle is x, so the complement is 4x, and together, these add up to 90 degrees.   x + 4x = 90   5x = 90   x = 18°   Answer = (18°)
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If the complement of a certain angle is four times the measure of that certain angle, then what is the measure of that certain angle?