# Math Help - Radians

1. ## Radians

Suppose an ant walks counterclockwise on the unit circle from the point (-1,0) to the endpoint of the radius that forms an angle of 5.8 radians with the positive horizontal axis. How far has the ant walked? Give exact answer in terms of 'pi'

The distance walked by the ant is: ?

2. ## Re: Radians

Originally Posted by jonathanraxa
Suppose an ant walks counterclockwise on the unit circle from the point to the endpoint of the radius that forms an angle of 5.8 radians with the positive horizontal axis. How far has the ant walked? Give exact answer in terms of
The distance walked by the ant is: ?
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Please try again.

3. ## Re: Radians

5.8 radians takes you into the 4th quadrant. So arc joining start point to end point makes angle of 5.8-pi at the centre. Since radius=1 arc length=5.8-pi

4. ## Re: Radians

If you have been asked to do this problem, whoever gave it to you expects you to know how "radian" measure is defined. Please tell us what you do know and show us what you have done on this problem.