Here is a line [i]m[/i] and a point C not on the line. Use straightedge and compass moves to construct a line perpendicular to line [i]m[/i] that goes through point C.

Here is a line [i]m[/i] and a point C not on the line. Use straightedge and compass moves to construct a line parallel to line [i]m[/i] that goes through point C.

Use straightedge and compass tools to construct a square with segment AB as one of the sides.