True or False: The principal angle for 720 degrees is 0 degrees.

True or False: Negative angles cannot have principal angles.

True or False: The principal angle for 450 degrees is 90 degrees.

True or False: Every angle has a unique principal angle.

True or False: If an angle is 180 degrees, its principal angle is also 180 degrees.

True or False: If an angle is in standard position, its principal angle is the measure of the angle itself.

True or False: The principal angle for -45 degrees is 315 degrees.

True or False: An angle and its coterminal angles have the same principal angle.

True or False: The principal angle for -270 degrees is 270 degrees.

True or False: If an angle is 390 degrees, its principal angle is 30 degrees.