Construction Aid Line > Mid-Perpendicular (Construct Menu)

This command draws a Construction Aid line which runs along the mid-perpendicular of another line. This Construction Aid line is drawn so that it appears as a right angle in the current view.

Any line in an existing object can be identified as a reference line, including a side of a rectangle or a circle segment leg. Construction Aid endless lines cannot be identified as they have no "middle".

After identification, a straight line appears which runs along the mid-perpendicular of the identified line. This is referred to as the "Reference Straight Line".

The start point of the Construction Aid line can be entered by clicking the mouse anywhere in the drawing. A perpendicular is dropped from this position to the reference straight line to determine the start point of the new Construction Aid line.

The end point of the Construction Aid line can be entered by clicking the mouse anywhere in the drawing. A perpendicular is dropped from this position to the reference straight line to determine the end point of the new Construction Aid line.