Question

what is the measurement of this angle?

Explanation:

Step1: Read the inner scale

The inner scale of the protractor is used when the angle is measured in a counter - clockwise direction from the right - hand side. Here, one side of the angle is at \(90^{\circ}\) (inner scale) and the other side is at \(50^{\circ}\) (inner scale).

Step2: Calculate the angle measure

The measure of the angle is \(90^{\circ}-50^{\circ}\)

Answer:

\(40^{\circ}\)