Question: central angle

Answer: an angle whose vertex is at the center of a circle and whose sides are radii

Question: A degree is _________ of the circular rotation around a point.

Answer: 1/360

Question: The sum of the measures of the central angles of a circle is ____________

Answer: 360 degrees

Question: arc

Answer: a portion of a circle defined by two endpoints

Question: The measure of the central angle is _________ to the arc measure.

Answer: equal