Circle

Center of circle

Specifies the center of the circle; enter x,y,z coordinates, or pick a point in the drawing.

Diameter

Specifies the diameter of the circle; prompts you:

Diameter of circle - enter a distance, coordinates, or pick a point.

Radius

Specifies the radius of the circle; prompts you:

Radius of circle - enter a distance, coordinates, or pick a point.

2Point

Defines the circle by two points on its circumference; prompts you:

First point on diameter - enter coordinates, or pick a point.

Second point on diameter - enter coordinates, or pick another point.

The abbreviation for this option is 2P.

3Point

Defines the circle by three points on its circumference; prompts you:

First point on circle - enter coordinates, or pick a point.

Second point - enter coordinates, or pick another point.

Third point - enter coordinates, or pick another point.

The abbreviation for this option is 3P.

RadTanTan

Defines the circle by two points tangent to other entities and the radius; prompts you:

Select first tangent point - enter coordinates, or pick an entity.

Select second tangent point - enter coordinates, or pick another entity.

Radius of circle - specify distance, or pick two points.

The abbreviation for this option is RTT.

The Tangent entity snap is activated automatically when you are prompted to identify the tangent points.

Arc

Converts arcs to circles by closing them; prompts you:

Select arc to convert to circle: (Choose an arc.)

See Arc command.

Multiple

Repeats the command until you press Esc.