Question

the measure of an angle is 13.1°. what is the measure of its complementary angle?

Explanation:

Step1: Recall complementary - angle formula

Complementary angles add up to $90^{\circ}$. Let the given angle be $A = 13.1^{\circ}$ and its complement be $B$. Then $A + B=90^{\circ}$.

Step2: Solve for the complement

$B = 90^{\circ}-A$. Substitute $A = 13.1^{\circ}$ into the formula: $B=90 - 13.1=76.9^{\circ}$.

Answer:

$76.9^{\circ}$