Drawing a Three-Point Circle

  1. Click Three-Point Circle in the Sketch group.

  2. (Optional) Select Three-point circle segment in the Options panel to create an arc that is a segment of a three-point circle.

  3. Click to set the first point on the circle's edge.

    If you click a curve or line, the circle will be drawn tangent to the curve or line, unless you click the midpoint or vertex.

    You can dimension the points relative to other sketch objects.

  4. Click to set the second point on the circle's edge.

    If the circle disappears as you move your mouse over the sketch grid, then the cursor location cannot be included in any circle drawn through the first two points and the current point. If you click a curve or line, the circle will be drawn tangent to the curve or line unless you click the midpoint or vertex.

    If you sketch two circles that are tangent to each other, and then change the diameter of one circle by editing its dimension, tangency with the other circle is maintained.

  5. Click to set the last point on the circle's edge.

    (Optional) For a Three-point circle segment, enter the diameter or click to set the final point.

    If you sketch two circles that are tangent to each other, and then change the diameter of one circle by editing its dimension, tangency with the other circle is maintained.

    If you drag the center of a circle that is tangent to another circle, the radius of the other circle changes to maintain tangency.