Question

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

Explanation:

Step1: Read the protractor

The protractor is used to measure angles. Point \(B\) is the vertex of \(\angle ABC\). One side \(BC\) is aligned with \(0^{\circ}\) (the right - hand side baseline).

Step2: Determine the measure

The other side \(BA\) points to the mark labeled \(30\). So, \(m\angle ABC = 30^{\circ}\).

Answer:

$30$