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pyramid

pyramid

27 2.7
A solid shape with a many-sided base and triangular faces that meet at one point
  • noun
  • /ˈpɪrəmɪd/
translation icon : pirámide
  • In geometry class, we learned how to calculate the volume of a pyramid with a square base.
  • a pyramid shape

They are not rectangles, they are not pyramids, they are spheres.

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Examples

Compounds

A dishonest plan where people pay to join and only earn money by recruiting others, not by selling things

A very large ancient Egyptian tomb for Pharaoh Khufu at Giza with a square base and four triangle-shaped sides

food pyramid
  • Specialized
4 3.9

A diagram showing who eats whom in an ecosystem, from plants to top predators

A very large ancient Egyptian tomb in Giza built for the king Khufu about 2600 BC

9.9

A low-growing plant that stays green and has blue or purple flowers

9.9

A tall plant with a stalk and pale green flowers that grows on dry sunny hills in western US

regular pyramid
  • Specialized
6.8

A solid with a flat base with all sides equal and triangular faces that meet at one top point

truncated pyramid
  • Specialized
7.2

A pyramid with the top cut off by a flat cut parallel to its base

square pyramid
  • Specialized
5.3

A solid shape with a square base and four triangular faces that meet at a top point

Surface Forms

pyramid singular
pyramids plural

Etymology

In geometry the word pyramid keeps the same idea as the Egyptian tombs named pyramis: a solid with a flat base and triangular faces that all meet at one top point, so the shape itself gives the name and meaning.