Question

The measure of an angle is 39.9°. What is the measure of its complementary angle?

Answer 1

50.1°

Explanation:

What is an angle?

An angle is a measure of a turn, measured in degrees or °. Angles are made up of two rays, making the sides of the angle.

What is a complementary angle?

For two angles to be complementary, they need to add up to 90°.

If we now know that two complementary angles add up to 90°, we can use this equation to solve for the missing degree:

• 90 - 39.9 = 50.1

To check, we can use this equation:

• 39.9 + 50.1 = 90

Therefore, the measure of the missing angle is 50.1°.