Question

the measure of an angle is 69°. what is the measure of its complementary angle?

Explanation:

Step1: Recall complementary - angle definition

Complementary angles add up to 90°.

Step2: Calculate the complementary angle

Let the given angle be \(A = 69^{\circ}\), and the complementary angle be \(B\). Then \(B=90^{\circ}-A\). Substitute \(A = 69^{\circ}\) into the formula: \(B = 90^{\circ}-69^{\circ}=21^{\circ}\).

Answer:

\(21^{\circ}\)