# If Angle a has a Measurement of 42° and is Complementary to Angle b, What's the Measure of Angle b?

We will be using the basic definition of complementary angles to solve this.

## Answer: If Angle a has a Measurement of 42° and is Complementary to Angle b, then the Measure of Angle b is 48°.

Let us solve it.

**Explanation:**

A pair of angle are said to be complementary if their sum is 90 degrees. The complement of x° is 90 - x°.

Given that, one angle has a measurement of 42°.

⇒ Angle b = 90° - 42°

Angle b = 48°