What is the measure of the central angle of a circle with radius 30 centimeters that intercepts an 18Ο centimeters arc?
Accepted Solution
A:
the circumference of the circle when r=30 is C=60Ο the arc is 18Ο, it is 18Ο/60Ο=3/10 of the whole circle the arc is 3/10 of 360 degree, which is 108 degree the central angle measures the same as the arc, 108 degree.