Question

suppose $m\angle a = 290$ degrees. then $\angle a$ is an angle quadrant in one two three four the reference angle for $\angle a$ is degrees. question help: video written example

Explanation:

Step1: Determine quadrant of 290°

Quadrant ranges: 0-90°(1), 90-180°(2), 180-270°(3), 270-360°(4). 290° is in 270-360°, so Quadrant Four.

Step2: Calculate reference angle

Reference angle for 270°<θ<360°: 360°−θ.
$360^\circ - 290^\circ = 70^\circ$

Answer:

D. Four
70