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A line diagram of a pentagonal prism with a slice of its cross section coloured in yellow. The cross-section is identical shape and size to the faces of the shape at each end, demonstrating that this is a prisms.

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Prism Cross Section

This diagram shows how a prism has the same cross-section (the yellow part) all the way through, and that if a prism was cut at any point along their length, the cross-section would be identical in shape and size to the faces at both ends.
© Leeds Museums and Galleries.