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