Quick Reference ~ A maths Dictionary for Kids by Jenny Eather Email jeather@iprimus.com.au A Maths Dictionary for Kids by Jenny Eather at www.amathsdictionaryforkids.com



• a tetrahedron is a polyhedron with 4 triangular faces,
in other words, a triangular pyramid.
• a regular tetrahedron is one of the Platonic solids having
4 congruent faces that are equilateral triangles with
3 faces meeting at each vertex.

• a three-dimensional polyhedron with four congruent triangular faces
• one of the five Platonic Solids.

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