Question

a 180° angle and a -90° angle were given as examples of quadrantal angles. give the measure of another quadrantal angle.

Explanation:

Step1: Recall definition of quadrantal angles

Quadrantal angles are angles in standard position whose terminal side lies on an axis. They are multiples of 90 degrees or $\frac{\pi}{2}$ radians.

Step2: Give an example

One such angle is $270^{\circ}$.

Answer:

$270^{\circ}$