Question

what is the measure of this angle? m∠abc = ?

Explanation:

Step1: Locate the angle on protractor

We see ray BA and ray BC. Starting from 0° on the inner - scale of the protractor where ray BC is aligned, we measure the angle to ray BA.

Step2: Read the measurement

The inner - scale of the protractor where ray BA intersects shows the measure of ∠ABC. It is 120°.

Answer:

120°