# Square Toroid

Toroid is a polyherdon homeomorphic to a torus with all faces simple polygons. The one shown below consists of 16 vertices, 32 edges and 16 faces. The Euler formula works as

V - E + F = 16 - 32 + 16 = 0 = 2 - 2·1

in agreement with the shape having one tunnel.

 What if applet does not run?

Drag the mouse to rotate the prism. Use the right button to remove and put back individual faces.

(Acknowledgement: I have learned most of Java details from the implementation by Meiko Rachimow.)

• Right Pentagonal Prism
• Square Pyramid
• Right Triangular Prism
• Twisted Triangular Prism
• Tetrahedron: an Interactive Model
• Octahedron: an Interactive Model
• Cube: an Interactive Model
• Icosahedron: an Interactive Model
• Dodecahedron: an Interactive Model
• Three Pyramids are Better Than Two
• Cube In Octahedron
• Octahedron In Cube
• Octahedron In Tetrahedron
• Tetrahedron In Cube
• Icosahedron In Cube
• Great Stellated Dodecahedron
• Lennes' Polyhedron
• Triangulated Dinosaur
• Volumes of Two Pyramids
• Császár Polyhedron 1
• Császár Polyhedron 4
• Szilassi Polyhedron
• Dissection of a Square Pyramid