Question

find the measure of angle b.

round to the nearest tenth.

Explanation:

Step1: Use the sum of angles in a triangle

The sum of angles in a triangle is \(180^{\circ}\). So, \(\angle B=180^{\circ}-\angle A - \angle C\).
Given \(\angle A = 109^{\circ}\) and \(\angle C=13^{\circ}\), then \(\angle B=180^{\circ}-109^{\circ}-13^{\circ}\).

Step2: Calculate the value of \(\angle B\)

\(\angle B = 58^{\circ}\)

Answer:

\(58\)