QCad User Reference Manual

# 19. Circles

## 19.1. Circle with Center and Point

CAD Toolbar:

Menu:

    Draw - Circle - Center, Point

Hotkey:

    ci

Command:

    circle

Description:

Constructs a circle with a given center and a point on the circle line.

Procedure:

1. Set the center of the circle using the mouse or enter a coordinate in the command line.
2. Define the radius by clicking a point on the circle line or by entering a coordinate into the command line. You may also enter the radius directly in the command line.

## 19.2. Circle with Center and Radius

CAD Toolbar:

Menu:

    Draw - Circle - Center, Radius

Command:

    circlecr

Description:

This tool lets you create circles with a given center and radius.

Procedure:

1. Enter the radius in the option toolbar or use the command `radius`, `rad` or `r` to enter the radius on the command line.
2. Set the center of the circle using the mouse or enter a coordinate in the command line.

## 19.3. Circle with 2 Points

CAD Toolbar:

Menu:

    Draw - Circle - 2 Points

Command:

    circle2p

Description:

Draws circles with two diametrically opposed points.

Procedure:

1. Set the first point using the mouse or enter a coordinate in the command line.
2. Set the second point.

## 19.4. Circle with 3 Points

CAD Toolbar:

Menu:

    Draw - Circle - 3 Points

Command:

    circle3p

Description:

If you know any three points on the circle line of a circle, you can use this tool to create circles.

Procedure:

1. Set the first point using the mouse or enter a coordinate in the command line.
2. Set the second point.
3. Set the third point.

## 19.5. Concentric Circle

CAD Toolbar:

Menu:

    Draw - Circle - Concentric

Command:

    offset, of

Options Toolbar:

Description:

With this tool you can create concentric circles.

Procedure:

1. Enter the distance of the concentric circle from the original base circle in the options toolbar shown at the top or in the command line.
2. Enter the number of concentric circles to create in the options toolbar.
3. Click the base circle. The concentric circle(s) are created on that side on which the mouse cursor is located while selecting the base circle.