Reference Angles is the angle formed by a terminal side of a given angle (x°) and the x-axis.
If the terminal side of the the given angle, x°, falls on:
Quadrant I: Reference Angle = x°
Quadrant II: Reference Angle = 180° - x°
Quadrant III: Reference Angle = x° - 180°
Quadrant IV: Reference Angle = 360° - x°
