Specify a point if you want to use the three-point method to create the arc, or enter one of the following options at the Command prompt:
To draw an arc by specifying the center and either the endpoint and/or an included angle, enter ce. Then specify a center point, enter an included angle and second point (both optional) and an endpoint.
To draw an arc by specifying the endpoint and an included angle or center point, enter e. Then specify an endpoint and an included angle.
If you want to draw a straight line segment, enter L (Line) and continue specifying points.
To connect the start point with the endpoint, enter cL (Close). Otherwise, press Enter to complete the double line.