progeCAD Professional manual The low-cost alternative to AutoCAD


Do you want to try progeCAD Professional?
Download the trial: you can try the product, without any limit, for 30 days!

A manual page a day... Click here to see the manual table of contents.

Creating simple entities

Drawing elliptical arcs

An elliptical arc is a portion of an ellipse. The default method for drawing an elliptical arc is to specify the endpoints of one axis of the ellipse, and then specify a distance representing half the length of the second axis. Then you specify the start and end angles for the arc, measured from the center of the ellipse in relation to its major axis. You can draw elliptical arcs using any of the following methods:

Axis-axis (

  • Axis-rotation (
  • )
  • Center-axis (
  • )
Center-rotation ( )
To draw an elliptical arc by specifying the axis endpoints
  1. Do one of the following:
  2. Choose Draw > Ellipse > Arc.
  3. On the Draw toolbar, click the Elliptical Arc Axis-Axis tool (
  4. ).
  • Type ellipse and then press Enter, and then type a (for Arc) and press Enter.
  • Specify the first endpoint.
  • Specify the second endpoint.
  • Specify the half-length of the other axis.
  • Specify the start angle of the arc.