From Anne Grant: I am a grade 8 teacher and have come across the term "Triakis" used with Tetrahedron, octahedron, and hexahedron. What does this term refer to, and what's the difference between a triakis polyhedron and one that is not?
I'd also like to know what is meant by the term antiprism, as opposed to prism.
Answered by Penny Nom.
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