Example image of eyePlorer eyePlorer map for 'Cut-the-Knot': Mathematics Encyclopædia Britannica Science (journal) Scientific American Alexander the Great Gordian Knot Applet Collage theorem Barbier's theorem Poncelet–Steiner theorem Tromino Carnot's theorem Angle bisector theorem Hjelmslev's theorem Parallelogram law Translation (geometry) Steinhaus–Johnson–Trotter algorithm Symmedian Butterfly theorem Equiangular polygon Equilateral polygon Cyclic quadrilateral Euler line Homothetic transformation Pascal's theorem Malfatti circles Power center (geometry) Square triangular number Brahmagupta theorem Monge's theorem Pick's theorem Sperner family Median (geometry) Pappus's hexagon theorem Equal incircles theorem Lune of Hippocrates Transitive relation Missing square puzzle Mathematics of paper folding Buffon's needle Pole and polar Bisection Sainte-Laguë method Ducci sequence Reflection (mathematics) Ford circle Reuleaux triangle Parallelogram Glide reflection Inscribed angle