Find the Reference Angle

Find the reference angle for each. Define what a reference angle is. Do not just give the answer.

(1) 1000 degrees

(2) 5pi/4

1) 1000 = 2(360)+280 = 280 degrees lies in quadrant 4 and the reference angle is 80 degrees

2) 5pi/4 = pi + pi/4
The reference angle is pi/4 and lies in quadrant III