If angle A has a measurement of 42 and is complementary to angle B, what’s the measure of angle B?

To find the measure of angle B, we need to recall the definition of complementary angles. Two angles are said to be complementary if the sum of their measures is equal to 90 degrees.

Given that angle A measures 42 degrees, we can set up the following equation:

Angle A + Angle B = 90

Substituting the known value:

42 + Angle B = 90

Now, we can isolate angle B by subtracting 42 from both sides:

Angle B = 90 – 42

That simplifies to:

Angle B = 48

Therefore, the measure of angle B is 48 degrees.