Question

what is the measurement of this angle?

Explanation:

Step1: Identify the inner and outer scale

The protractor has two scales (inner and outer). We need to check which scale to use based on the direction of the angle's opening.

Step2: Read the measurement

Since the angle is measured from the left - hand side (where the \(0^{\circ}\) mark starts on the outer scale for this orientation), we look at the outer scale. The first ray is at \(40^{\circ}\) and the second ray is at \(100^{\circ}\) on the outer scale.

Step3: Calculate the angle measure

The measure of the angle is \(100 - 40=60^{\circ}\)

Answer:

\(60\)