Constructing Circles

You can use one of several methods to create Circles.

To construct a Circle from its center point and radius:

1. Click Draw > Circle > Center, Radius (or type Circle).
2. In the graphics area, specify the:
   1. Center point of the Circle.
   2. Circle radius.

   

To construct a Circle from its center point and diameter:

1. Click Draw > Circle > Center, Diameter.
2. In the graphics area, specify the:
   1. Center point of the Circle.
   2. Circle diameter.

To construct a Circle from three points:

1. Click Draw > Circle > 3 Points (or type Circle then specify the 3Point option).
2. In the graphics area, specify three points that define points on the Circle.

To construct a Circle from two points along the diameter:

1. Click Draw > Circle > 2 Points (or type Circle then specify the 2Point option).
2. In the graphics area, specify two points that define the Circle diameter.

To construct a Circle from two tangent entities and the radius:

1. Click Draw > Circle > Tangent, Tangent, Radius (or type Circle then specify the Ttr option).
2. In the graphics area:
   1. Select a point on each of two linear entities that define lines tangent to the Circle.
   2. Specify two points to define the radius, or type the radius value.

   

To construct a Circle that is tangent to three lines:

1. Click Draw > Circle > Tangent, Tangent, Tangent (or type Circle then specify the TTT option).
2. In the graphics area, specify a point on three linear entities that define lines tangent to the Circle.

   

  This option is useful when inscribing the Circle within a regular polygon.

Access

Command: Circle

Menu: Draw > Circle