Example image of eyePlorer eyePlorer map for 'Equilateral triangle': Geometry Triangle Equiangular polygon Euclidean geometry Regular polygon Altitude (triangle) Circumscribed circle Incircle and excircles of a triangle Pythagorean theorem Reflection symmetry Rotational symmetry Dihedral group of order 6 Symmetry group Polyhedron Platonic solid Tetrahedron Tiling by regular polygons Triangular tiling Morley's trisector theorem Euclid's Elements Heronian triangle Irrational number Archaeological site Continued fraction Lepenski Vir Pell's equation Jefferson National Expansion Memorial Randhurst Mall Flag of Junqueirópolis Flag of the Philippines Seal of the President of the Philippines Pythagoreanism Tetractys The Two Babylons Trinity Fraternity NIC Tau Kappa Epsilon Deltahedron Euler line Napoleon's theorem Polyiamond Three Pagodas Viviani's theorem Apeirogonal antiprism Cupola (geometry) Epoxide Kanizsa triangle Kepler–Bouwkamp constant Octahedron