A pyramid is a polyhedron whose surface is formed by a base that is any polygon and triangular lateral faces that meet at a vertex called apex (or vertex of the pyramid). Pyramids have as many triangles on the lateral faces as there are sides on the base.​

Serra, B. R. (2014, abril 17). Pirámide. Universo Formulas. https://www.universoformulas.com/matematicas/geometria/piramide/

​PYRAMID

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​URL:https://upload.wikimedia.org/wikipedia/commons/thumb/c/cf/Pir%C3%A1mide.svg/1200px-Pir%C3%A1mide.svg.png

In a pyramid the following elements can be differentiated:

​Base (B): any polygon. It is the only face that does not touch the vertex of the pyramid.

Faces (C): the triangles of the sides and the base.

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​Pyramid elements​

Serra, B. R. (2014, abril 17). Pirámide. Universo Formulas. https://www.universoformulas.com/matematicas/geometria/piramide/

​Edges (a): segments where two faces of the pyramid meet. We can distinguish: lateral edges, which are those that reach the vertex (or apex) and basic edges, which are at the base.

Height (h): distance from the plane of the base to the vertex of the pyramid.​

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​Pyramid elements​

Serra, B. R. (2014, abril 17). Pirámide. Universo Formulas. https://www.universoformulas.com/matematicas/geometria/piramide/

​Vertex of the pyramid (V): point where the triangular lateral faces meet. Also called apex.​

​Apothem of the pyramid (ap): distance from the vertex to one side of the base.

Apothem of the base (apb): distance from one side of the base to its center.

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​Pyramid elements​

Serra, B. R. (2014, abril 17). Pirámide. Universo Formulas. https://www.universoformulas.com/matematicas/geometria/piramide/