Question

If the measure of < A is 39°, and the measure of < B is 51°, then < A and < B are ______.Select one:a.complementaryb.verticalc.colineard.supplementary

Answer 1

ANSWER:

a. complementary

STEP-BY-STEP EXPLANATION:

We have the following:

Complementary Angles: Two or more angles are complementary if their measures add up to 90°. Supplementary Angles: Two or more angles are supplementary if their measures add up to 180°.

Therefore, we add angles A and B, like this:

$\begin{gathered} \angle A+\angle B \\ \\ 39\degree+51\degree=90\degree \end{gathered}$

This means that the two angles are complementary since they add up to 90°, so the correct answer is: a. complementary