# Precalculus: More on Trigonometry Radians

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### True or False? A radian is a unit of an angle, equal to an angle at the center of a circle whose arc is equal in length to the radius.

True
False
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### How many degrees does $$pi$$ radians equal to?

$$1080^{\circ}$$
$$360^{\circ}$$
$$180^{\circ}$$
$$90^{\circ}$$
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