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Pyramid   (Engelsk)

Definition

A solid shape with a polygon for a base and triangles as the sides that come to a point at the top.

Definition

A 3-D shape with a base which is a polygon and triangular sides that come to a point, which is called the apex or vertex.

Definition

A special type of polyhedron.
It is a solid whose base is a polygon and its other faces are triangles which meet at a common vertex (sometimes called the apex).
A right pyramid is the name given to the pyramid which has its apex directly above the centre of its base.

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