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Circle Command.

Command: C (Enter)
CIRCLE

Specify center point for circle: Specifies the center point of circle. you may click at the center point of the circle on drawing or you can enter known co-ordinates.

3P: Draws a circle by specifying 3 point which are on the circumference of circle.

2P: Draw a circle by specifying two diamterically opposite points of circle. distance between both the points becomes diamter of the circle.

Tan Tan Radius: Draws a circle by tan to two objects by clicking the reference objects to which circle is tangent and then specifying radius for the circle.

Specify radius/ Diameter of circle: You can specify numeric value for radius or diamter of circle or click any know point on the drawing. by default autocad picks radius value. To enter diameter press 'D' when it ask to specify radius of circle.

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