Tangent Constraint

Available in TurboCAD LTE Pro / DoubleCAD Pro only

Makes an arc or circle tangent to another arc or circle, or to a line.

1. Start with a line and an arc/circle. Activate the Tangent constraint and select either object (when one object is a line, the selection order does not matter).
2. Select the other object.
3. If you edit either object, the tangent constraint will be maintained. . . . the line is moved so that its extension is tangent to the circle. . . . the arc is moved so that its extension is tangent to the arc/circle.