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# What solid has two congruent parallel discs for bases?

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## Related Questions

###### Asked in Math and Arithmetic, Geometry

### Which solid figure has two parallel bases that are congruent circular discs?

There are many possible answers. Some of them are:
1. A cylinder;
2. A sphere, ellipsoid, double cone, an isosceles double
paraboloid intersected by two parallel planes that are equidistant
from the centre of major axis and, except for the sphere,
perpendicular to it;
3. A torus (doughnut) cut in half be a vertical plane.

###### Asked in Math and Arithmetic, Algebra, Geometry

### What is a polyhedron with two parallel congruent bases and other faces being parallelograms?

It is a prismoid - a prism-like solid whose lateral faces are
not perpendicular to the bases.
It is a prismoid - a prism-like solid whose lateral faces are
not perpendicular to the bases.
It is a prismoid - a prism-like solid whose lateral faces are
not perpendicular to the bases.
It is a prismoid - a prism-like solid whose lateral faces are
not perpendicular to the bases.

###### Asked in Geometry

### How do you define a prism?

In optics a prism is a transparent solid body, often having
triangular bases, used for dispersing light into a spectrum or for
reflecting rays of light.
In geometry a prism is a solid having bases or ends that are
parallel, congruent polygons and sides that are parallelograms.
In crystallography a prism is a form having faces parallel to
the vertical axis and intersecting the horizontal axes.

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