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What is a polyhedron?

A polyhedran is a 3D solid figure with a flat surface.

A polyhedran does not have any curved surfaces.

Polyhedron is derived from poly=many

Hedron = Face so it means many faced geometric shape

Is a Dodacahedron a polyhedron?    yes

Is a triangle a polyhedron? No it is only 2D

Is a sphere a polyhedron? No it has curves

Is a coffee mug a polyhedron? No it has curves

Some common examples of polyhedron are prisms and pyramids.

Euler's Polyhedron Theorem states that the number of faces + number of vertices = number of edges + 2

What is a polyhedron?

What is a polyhedron?
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Platonic Solids