Angle · Center · Direction · End · Radius · <Second point>: To continue drawing an arc, specify a second point for it. This second point lies anywhere along the arc. To specify the angle of the arc, choose Angle. To specify the center point of the arc, choose Center. To specify the direction of the arc, choose Direction. To specify the endpoint of the arc, choose End. To specify the radius of the arc, choose Radius.
End point: Specify the endpoint of the arc.