Question: Value of π

Answer: 3.141….

Question: Circumference of a circle

Answer: C=πD or C=2πr

Question: Value of pi comes from…

Answer: C/D

Question: central angle of a circle

Answer: an angle whose vertex is the center of the circle

Question: intercepted arc

Answer: the portion of the circle with endpoints on the sides of the central angle and remaining part within the interior of the angle

Question: How are radians used to measure rotation around a circle?

Answer: by using the intercepted arc of a central angle in standard position

Question: One radian is measured as…

Answer: …when the intercepted arc is equal to the distance of the radius

Question: One time around a circle is equal to what?

Answer: 2 π radians

Question: 180 degrees is equal to how many radians?

Answer: π radians

Question: Convert degrees to radians

Answer: multiply by π/180 degrees