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:

1. Choose the direction of the arc in the options toolbar or using the command `reversed` , `rev` or `r` .
2. Set the center of the arc using the mouse or enter a co-ordinate in the command line.
3. 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.
4. Set the start angle with the mouse or by entering a co-ordinate or the angle amount in the command line.
5. 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:

1. Set the start point using the mouse or enter a co-ordinate in the command line.
2. Set the second point to a known point on the arc line.
3. Set the endpoint of the arc.

### Parallel Arc

CAD Toolbar:

Menu:

Draw - Arc - Parallel

Command:

?

Options Toolbar:

Description:

With this tool you can create parallels to existing line, arc and circle entities.

Procedure:

1. Enter the distance of the parallel from the original entity into the options toolbar shown at the top or in the command line.
2. Enter the number of parallels to create in the options toolbar.
3. Click the entity to which you want to create a parallel. The parallel is created on the side on which the mouse cursor is located while selecting the entity.