Q: Name a 3D shape which has 7 faces?

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Pentagonal prism.

A hexagon based pyramid.

A hexagon based pyramid.

A right pentagonal prism.

heptahedron

Related questions

A Pyramid is a 7 lettered 3D shape with triangular faces.

heptahedron

Pentagonal prism.

a square

Pryimaid

A hexagon based pyramid.

A hexagon based pyramid.

It cannot be a simply connected 3d shape because it does not satisfy the Euler characteristic.

A right pentagonal prism.

heptahedron

A polyhedron is a solid figure with many plane faces, usually greater than six. A polyhedron that has 7 faces is called a heptahedron.

You can have a 3d shape with any no of sides 3d only means there are three measure needed to calculate volume, or in other words you can pick it up and touch it. These three measurements are width, depth and height. If the faces all had to be of the same area and flat there might not be a 7 sided 3d shape (or a regular one at least) there can always be a n-sided non-irregular shape even a 1,253,703-sided irregular shape is theoretically possible.