Make a measurement add a geometric reference does Measurement have links to 3D geometry measure the difference between references to obtain resultant vector measure the difference between references to obtain resultant vector measure the length of the references measure the volume of the references measure the area of the references measure the line-Line Distance of the references. Returns 0 if references are not 2 lines. measure the plane-plane distance of the references. Returns 0 if references are not 2 planes. measure the angle between two edges measure the radius of an arc or circle edge measure the center of mass for selected volumes