Enter the start point of the arc, and then choose End.
End of arc: Specify the endpoint of the arc, and then press Enter.
Angle · Direction · Radius · <Center point>: To draw an arc using the Start-End-Center method, which is the default, specify the center of the arc.
To draw an arc using the Start-End-Angle method, choose Angle and then specify the included angle of the arc.
To draw an arc using the Start-End-Direction method, choose Direction and then specify the direction in which you want to draw the arc. The default direction is counterclockwise.
To draw an arc using the Start-End-Radius method, choose Radius and then specify the radius of the arc's implied circle. To specify the radius, type it or specify two points that define its length.