Question

One of a pair of complementary angles is half the other. Find the measure of each angle.

Answer 1

large angle = 60

small angle = 30

Explanation:

x + y = 90 Definition of complementary

y = 1/2 x Definition smaller angle

x + 1/2 x = 90 Substitute for y

3/2 x = 90 Combine terms on the left

3/2 x * 2/3 = 90* 2/3 Multiply both sides by 2/3

x = 60 Find y

y + x = 90

y + 60 = 90

y = 90 - 60

y = 30