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A hexahedron.

Which may also be known as a pentagonal pyramid.

Although it could also be a horizontal pentagon with a vertical pentagonal band formed by ten triangles (aternately facing up and down), topped by five trianles meeting at an apex: a 16-faced polyhedron. Or, of course, it could have two bands of vertical facing triangles - making a 26-hedron, etc.

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13y ago

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