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Anchor text: Interactive Applet

Wikipedia: Curve of constant width

Anchor text: Pythagorean theorem by shear mapping

Wikipedia: Shear mapping

Anchor text: Dynamic Pinwheel

Wikipedia: Pinwheel tiling

Anchor text: Interactive Applet

Wikipedia: Steiner chain

Anchor text: Kosnita theorem and Dao's theorem on six circumcenters

Wikipedia: Wikipedia:Articles for deletion/Dao's theorem on six circumcenters

Anchor text: Graphical all-haversine Hc reduction

Wikipedia: Sight reduction