Question

What is always true about a linear pair?

O A. The sum of angle measures is 180°.
B. Each angle measure is the same.
O C. The sum of angle measures is 90°.
D. The sum of angle measures is 360°.

Answer 1

O A. The sum of angle measures is 180°.

Explanation:

A linear pair of angles are supplementary.

They must add up to 180°.

Linear pairs also would form a straight angle. A straight angle is 180°.

Hope this helps.