What part of the right angle is the angle, the degree measure is 72 °?

Let us calculate which part of the angle, whose degree value is 90 °, will make up another angle, if we know, based on the conditions of this assignment, that the degree value of the other angle is, in turn, 72 °:

72: 90 = 72/90 = 4/5 = 0.8.

Answer: An angle, whose degree value is 72 °, is a part equal to 4/5 or 0.8 from a right angle.