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Q: How many bases does a 3d pentagon have?

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a 3D pentagon

15

The vertex of a 3D pentagon is 10. :)

A 3D name for a pentagon is a pentagonal prism.

10

ten

5

No, a pentagon is 2-D.

a pentagon is a 5 sided figure so 5 (if you mean sides, not bases)

Two pentagonal bases.

A 3D pentagon could be called a pentagon prism or a dodecahedron which is a Platonic solid with 12 pentagonal faces.

A pentagonal prism will have 15 edges.

A pentagon consists of 5 bases and 5 angles.

3D pentagonal prismPRISM

It depends on what you mean by a 3-d pentagon. To most people, a 3-d pentagon is a dodecahedron - a 3d shape with 12 pentagonal faces. In that case, each of the faces, by definition, must be a pentagon! If you mean a pentahedron - a 3d shape with 5 plane faces, it could be a triangular prism or a quadrilateral based pyramid. In the first cae the bases are triangles, in the second, a quadrilateral.

78977

A hexahedron.

Pentagonal Prism?

pentagonal prism

pentagon

pentagon

No.

Pentagon 2d shape is a pentagon 3d object is a pyramid.

An edge of a 3-d pentagon is the intersection of two of its adjacent faces.

If you are thinking of a solid with pentagonal faces, a dodecahedron, there are twelve pentagons