Detailed Drawings > Working with Drawing Sketches > Sketching in Drawing > To Create a Circle
  
To Create a Circle
Click Sketch > Circle. The Snapping References dialog box opens. Use the arrow icon in the dialog box to add any references you want to set up before you sketch.
Choices for circles include:
• Locating its center and defining a radius point
• Making it tangent to other entities
• Locating its center and defining a point as the tangency with another entity
• Making it tangent to three other entities
• Making it tangent to two other entities, with a specified radius
• Using any three points that lie on the circle