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pyramid

pyramid

58 2.7
A solid shape with a many-sided base and triangular faces that meet at one point
  • noun
  • /ˈpɪrəmɪd/
: 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

14 4.4

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

food pyramid
  • Specialized
5 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

square pyramid
  • Specialized
1 5.3

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

truncated pyramid
  • Specialized
1 7.2

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

regular pyramid
  • Specialized
1 6.8

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

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

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.