Tetrahedron

usgb/ˌtetrəˈhiːdrən/
noun

A solid shape made up of four triangular faces.

The volume of a tetrahedron can be calculated using certain formulas.
Visual representation of "tetrahedron" - A solid shape made up of four triangular faces.

Often appears as...

  • regular tetrahedron
  • volume of tetrahedron

Usage tips

Academic, Technical

Definition 1 of 1
Visual representation of "tetrahedron"
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Mathematical Concept

Understand that 'tetrahedron' refers to a precise mathematical shape, not any four-faced object.

Illustration for Mathematical Concept
Studying solids, I learned a tetrahedron is a specific type of polyhedron.
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Not Always Pyramid

While tetrahedrons resemble pyramids, they precisely have four triangular faces, unlike some pyramids.

Illustration for Not Always Pyramid
A pyramid in Egypt isn't a tetrahedron, as its base isn't triangular.
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Regular vs. Irregular

A regular tetrahedron has equal sides; irregular ones don't, but both share the four-face characteristic.

Illustration for Regular vs. Irregular
A regular tetrahedron is like a 3D equilateral triangle.
Visual representation of the word "Tetrahedron"

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