Question

what is the value of b? b 122.8°

Explanation:

Step1: Identify angle - type relationship

The two angles are supplementary (form a straight - line).

Step2: Use supplementary - angle formula

Supplementary angles add up to 180°. Let \(b\) be the unknown angle and the given angle is 122.8°. So, \(b + 122.8^{\circ}=180^{\circ}\).

Step3: Solve for \(b\)

\(b=180^{\circ}- 122.8^{\circ}\)
\(b = 57.2^{\circ}\)

Answer:

\(57.2^{\circ}\)