Question

the measure of an angle is 18°. what is the measure of its complementary angle?

Explanation:

Step1: Recall the definition of complementary angles

Complementary angles add up to \(90^{\circ}\). Let the measure of the complementary angle be \(x\). Then \(18^{\circ}+x = 90^{\circ}\).

Step2: Solve for \(x\)

Subtract \(18^{\circ}\) from both sides of the equation: \(x=90^{\circ}-18^{\circ}\).

Answer:

\(72\)