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Q: How many flat surfaces and edges and vertices has the cone?

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6 flat surfaces - known as faces, 12 edges 8 vertices.

No. By definition a polyhedron has to have faces (flat surfaces), edges, and vertices. A sphere, hemisphere, and a cylinder are all solids but are not polyhedra.

a cube

cone * * * * * No. If it is a finite cone it has an edge - circular or elliptical, depending upon the plane that terminates it. If it is not a finite cone, it does not have a flat edge.

cube pyramid cylinder * * * * * 3-d objects with only flat surfaces (a different question) are polyhedra.

Related questions

0 vertices 0edges 2 flat surfaces

6 flat surfaces - known as faces, 12 edges 8 vertices.

A sphere

A cylinder

A cylinder

a sphere, of course!

a cylinder l

A Cube..

a cube has 8 vertices 12 edges and 6 faces to of which are bases

A quadrilateral based pyramid.

Pyramid

A cone has 1 flat surface, because a cone has 1 corner and has 4 edges. The reason that is is because a cone is round. A cone has a flat surface at the bottom of the cone. The reason it is because the cone doesn't have any vertices and most of the solid and plane figures have vertices.

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