Remember that the radian measure of a central angle of a circle is the ratio of the arc length to the radius (see problem 10-55). is blue.
What is the radian measure for a
‑degree central angle on a circle with radius cm? What is the radian measure for a -degree central angle on a circle with radius cm? Answer in terms of .
Both answers in part a should be the same.
The central angle of a circle has a radian measure of
. What is the measure of the central angle of the sector in degrees?