Question

(a) an angle measures 87°. what is the measure of its supplement? (b) an angle measures 42°. what is the measure of its complement? measure of the supplement: measure of the complement:

Explanation:

Step1: Recall supplement - angle formula

Supplementary angles add up to 180°. Let the given angle be $\theta = 87^{\circ}$. The measure of its supplement $\alpha$ is given by $\alpha=180^{\circ}-\theta$.

Step2: Calculate the supplement

$\alpha = 180^{\circ}-87^{\circ}=93^{\circ}$

Step3: Recall complement - angle formula

Complementary angles add up to 90°. Let the given angle be $\beta = 42^{\circ}$. The measure of its complement $\gamma$ is given by $\gamma = 90^{\circ}-\beta$.

Step4: Calculate the complement

$\gamma=90^{\circ}-42^{\circ}=48^{\circ}$

Answer:

measure of the supplement: $93^{\circ}$
measure of the complement: $48^{\circ}$