pyramid is a solid that has the following characteristics.

  • It has one base, which is a polygon.
  • The vertices of the base are each joined to a point, not in the plane of the base. This point is called the vertex of the pyramid.
  • The triangular sides, all of which meet at the vertex, are its lateral faces.
  • The segments where the lateral faces intersect are lateral edges.
  • The perpendicular segment from the vertex to the plane of the base is the altitude of the pyramid.
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