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Circles

May 20, 2011

The default method for drawing a circle is to specify a center point and radius.

You can draw circles using any of the following methods:

  •      Center Radius

  •      Center Diameter

  •       Two points

  •       Three points

  •       Tangent Tangent Radius

  •       Tangent Tangent Tangent

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To draw a circle by specifying its center and radius

  1. Choose Draw > Circle>Center, Radius.

  2. Specify the center point.

  3. Specify the radius of the circle.

Draw toolbar\

Command line CIRCLE

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Center point (A) and radius (B)


To convert an arc to a circle

  1.   On the command line, enter circle > a.

  2.   Select the arc you want to convert to a circle.

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Select an arc (A) to convert to a circle


Draw a Circle Tangent to Other Objects

The tangent point is a point where an object touches another object without intersecting it. To create a circle that is tangent to other objects, select the objects and then specify the radius of the circle.

You can also turn on the Object Snap mode to set the snap point as Tangent, thus you can create circles that are tangent with other objects easily, three points method is available for creating circles with three tangent points.

In the illustrations below, the red circle is the one being drawn, and points 1 and 2 select the objects to which it is tangent.

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To draw a circle tangent to existing objects

  1. Choose Draw > Circle>Tan, Tan, Radius.

  2. Select the first tangent point on the object to be tangent with the circle.

  3. Select the second tangent point on the object to be tangent with the circle.

  4. Specify the radius of the circle.

Draw toolbar\

Command line CIRCLE

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Radius of circle (A) and tangent lines (B) and (C)


Commands Reference

CIRCLE: Creates a circle

OFFSET: Creates concentric circles, parallel lines, and parallel curves

OSNAP: Sets running object snap modes

System Variables Reference

CIRCLERAD: Sets the default circle radius

WHIPARC: Controls whether the display of circles and arcs is smooth 

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