JavaScript must be enabled in order to use this site.Please enable JavaScript in your browser and refresh the page. To Apply a Tangent 2D Constraint Select the Tangent 2D Constraint tool. Select a linear or non-linear (elliptical or circular) segment. Select a non-linear segment if you have selected a linear segment in the first step (at least one of the selection must be a curve). The two selected segments are now tangent to each other. Note: For two segments to be tangent, they must be on the same plane. Parent topic: Tangent 2D Constraint