JavaScript must be enabled in order to use this site.Please enable JavaScript in your browser and refresh the page. To Apply a Coincident 2D Constraint Select the Coincident 2D Constraint tool. Select a linear or a circular segment or a vertex. Select another linear or a circular segment or a vertex. The two selected elements now pass through a common point. Note: For two elements to be coincident, they must be on the same plane. Coincident 2D constraint. Left: between two points or vertices. Right: Between a vertex and a line. Parent topic: Coincident 2D Constraint