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The theorem formulated by Leonhard Euler describes one of the basic properties of convex polyhedra.
Leonhard Euler, edge, vertex, face, theorem, conjecture, proof, tetrahedron, polyhedron, geometry, mathematics, mathematician
The Császár polyhedron is a nonconvex polyhedron with 14 triangular faces.
The Ancient Greek scientist, Euclid of Alexandria, is often referred to as the 'father of geometry'.
This animation demonstrates various groups of solids through examples.
This animation demonstrates the five regular three-dimensional (or Platonic) solids, the best known of which is the cube.
A regular square pyramid is a right pyramid with a square base and four triangular faces.
To calculate the volume of a tetrahedron we start by calculating the volume of a prism.