QCad User Reference Manual
|  |  | ## Arcs ### Arc with Center, Radius and Angles CAD Toolbar: Menu: Draw - Arc - Center, Point, Angles Command: ? Options Toolbar: Description: Draw arcs with center, radius and angles given with this tool. Procedure: Choose the direction of the arc in the options toolbar or using the command `reversed` , `rev` or `r` . Set the center of the arc using the mouse or enter a co-ordinate in the command line. Define the radius by clicking a point on the arc or by entering a co-ordinate into the command line. You may also enter the radius directly in the command line. Set the start angle with the mouse or by entering a co-ordinate or the angle amount in the command line. Set the end angle the same way as the start angle. ### Arc with 3 Points CAD Toolbar: Menu: Draw - Arc - 3 Points Command: ? Description: If you know the startpoint, the endpoint and a point in the middle on the arc line, you can use this tool to create arcs. Procedure: Set the start point using the mouse or enter a co-ordinate in the command line. Set the second point to a known point on the arc line. Set the endpoint of the arc. ### Concentric Arc CAD Toolbar: Menu: Draw - Arc - Concentric Command: ? Options Toolbar: Description: With this tool you can create parallels to existing lines or concentric arcs and circles. Procedure: Enter the distance of the concentric or parallel entity from the original entity into the options toolbar shown at the top or in the command line. Enter the number of entities to create in the options toolbar. Click the base entity. The parallel or concentric entity is created on that side on which the mouse cursor is located while selecting the entity.
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