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A decahedron is a closed 3-D shape with ten polygonal faces. There are 32,300 topologically different decahdra and, since none of these are regular, the term is ambiguous. Some simple decahedra are:
- nonagon-based pyramid
- octagon-based prism
- square antiprism
- pentagonal dipyramid.
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Earn +20 ptsQ: How many lines of symetry does a decahedron have?
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