Photo Gallery

Two-sided ruler: Perpendicular through point off line without drawing a rhombus
Two-sided ruler: Perpendicular to line through point off line
Two-sided ruler: Perpendicular through point on line
Two-sided ruler: Perpendicular through middle of three equally spaced points
Two-sided ruler: Perpendicular bisector of line segment
Two-sided ruler: Perpendicular bisector by copying a length
Two-sided ruler: Double a line segment
Two-sided ruler: Copy a line segment along its line anywhere
Two-sided ruler: Rhombus anywhere
Two-sided ruler: Bisect a line segment
Two-sided ruler: Copy a line segment next to itself
Two-sided ruler: Double an angle