Suppose an ant walks counterclockwise on the unit circle from the point (-1, 0) to the endpoint of the radius corresponding to 6 radians. Then the ant has walked a distance of units. (round to the nearest hundredth place) Solution 6 radians takes you into the 4th quadrant. So arc joining start point to end point makes angle of 6pi at the centre. Since radius=1 arc length=6pi.