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A regular tetrahedron is a regular polyhedron composed of 4 equally sized equilateral triangles.

The regular tetrahedron is a regular triangular pyramid.

Unfold of a Regular Tetrahedron

Characteristics of the Tetrahedron

Number of faces: 4.

Number of vertices: 4.

Number of edges: 6.

Number of concurrent edges at a vertex: 3.

Surface Area of a Regular Tetrahedron

Volume of a Regular Tetrahedron

Example

Calculate the suface area and volume of a regular tetrahedron with an edge of 5 cm.

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Emma

I am passionate about travelling and currently live and work in Paris. I like to spend my time reading, gardening, running, learning languages and exploring new places.