Center Point

Draws a circle based on a center point and a diameter or a radius.

Specify radius of circle or [Diameter]: Specify a point, enter a value, enter d, or press ENTER

Radius

Defines the radius of the circle. Enter a value, or specify a point (2). The distance between this point and the center point determines the radius of the circle.

Diameter

Draws a circle using the center point and a specified distance for the diameter.

Specify diameter of circle <current>: Specify a point (2), enter a value, or press ENTER

3P (Three Points)

Draws a circle based on three points on the circumference.

Specify first point on circle: Specify a point (1)

Specify second point on circle: Specify a point (2)

Specify third point on circle: Specify a point (3)

2P (Two Points)

Draws a circle based on two endpoints of the diameter.

Specify first endpoint of circle's diameter: Specify a point (1)

Specify second endpoint of circle's diameter: Specify a point (2)

TTR (Tangent, Tangent, Radius)

Draws a circle with a specified radius tangent to two objects.

Specify point on object for first tangent of circle: Select a circle, arc, or line

Specify point on object for second tangent of circle: Select a circle, arc, or line

Specify radius of circle <current>:

Sometimes more than one circle matches the specified criteria. The program draws the circle of the specified radius whose tangent points are closest to the selected points.