2. Converting between Degrees and Radians: Radian: the measure of an angle that, when drawn as a central angle of a circle, would intercept an arc whose length is equal to the length of a radius of the circle. Lets determine how many degrees are in 1 radian… How many degrees are there once around a circle? 360

3. It may be necessary to convert from radian measure to degree measure. Radians to degrees: Change each angle from radian measure to degree measure.

4. Page 1

5. Degrees to radians: Change each angle from degree measure to radian measure. We need to simplify this fraction by using the calculator. Page 1

7. Finding the measure of an arc on a circle.

8. Page 1 21. Find the length of the radius of a circle in which a central angle of 4.5 radians intercepts an arc of 9 meters. Is the central angle in radians?

9. Page 1 21. What is the measure of an angle formed by the hands of a clock at 5:00? a.degrees? b.radians?

10. Page 1 27. Circle O has a radius of 10 inches. What is the length, in inches, of the arc subtended by a central angle measuring 2.5 radians?

11. Page 2

12. Homework Page 1 #2-20 even, 26,28,29,30