Question

select a pair of supplementary angles.* a and b b and c a and c

Explanation:

Step1: Recall definition of supplementary angles

Supplementary angles are two - angles whose sum is 180°.

Step2: Analyze the given angles

In the figure, we can see that angles \(a\) and \(b\) form a straight - line. A straight - line angle is 180°. So \(a + b=180^{\circ}\).

Answer:

a and b