Q: Which 3D object has no vertices?

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Cone

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

A triangular prism which will have 5 faces, 9 edges and 6 vertices

Vertices imply a 3D object. Circles are 2D so do not have one, but if you meant a sphere, your answer would still be no. This is because you need a corner with three edges meeting together to form a vertex.

In 2D, there are 6 vertices in a hexagon; there are 36 vertices in 6 hexagons. In 3D, it doubles up to 12 vertices.

Related questions

No. An example of a 3D object without vertices is a sphere.

A vertex is defined in Geometry and the point at which two lines or segments connect. If we think of a 2D square first we can count that it in fact has 4 vertices. One at the top left, one at the top right, one at the bottom left, and one at the bottom right. We understand in Geometry that a 3D object is a 2D object with an additional plane of space. So knowing this we can assume that there would have to be an additional 4 vertices to formulate a 3 Dimensional square - which is now a cube. So in conclusion If a 2D object has 4 vertices, then a 3D object since it has an additional plane of space would need an additional 4 vertices to make a square on the second plane of space. So we need a total of 8 vertices to make a 3D cube (3D square - though in technicality a square is 2D, a cube is 3D)

An octahedron. See related link.

As a 2d object, a diamond had four sides. As a 3d object, there are many different types of diamonds, all with their own numbers of vertices, edges and faces.

Cone

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

A triangular prism which will have 5 faces, 9 edges and 6 vertices

A sphere.

It is a 3D object It has 6 faces It has 12 edges It has 8 vertices It looks like a dice It can be formed into a 2D net

It could be an octagonal based pyramid

Vertices imply a 3D object. Circles are 2D so do not have one, but if you meant a sphere, your answer would still be no. This is because you need a corner with three edges meeting together to form a vertex.

In 2D, there are 6 vertices in a hexagon; there are 36 vertices in 6 hexagons. In 3D, it doubles up to 12 vertices.