Distance/Diameter

This constraint sets the diameter of an arc or a circle, or the length of a line segment, or the distance between a point and some other entity.

When constraining the distance between a point and a plane, or a point and a plane face, or a point and a line in a workplane, the distance is signed. The distance may be positive or negative, depending on whether the point is above or below the plane. The distance is always shown positive on the sketch; to flip to the other side, enter a negative value.