https://en.wikipedia.org/wiki/Tetrahedron

In geometry, a tetrahedron (plural: tetrahedra or tetrahedrons), also known as a triangular ... Regular tetrahedra alone do not tessellate (fill space), but if alternated with ..... tetrahedron has two special orthogonal projections, one centered on a vertex or ..... The tetrahedron has many properties analogous to those of a triangle, ...

https://www.mathsisfun.com/geometry/vertices-faces-edges.html

Has 5 Edges. For a polygon an edge is a line segment on the boundary joining one vertex (corner point) to another. ... of a solid object. This tetrahedron has 4 faces (there is one face you can't see) ... For many solid shapes the. Number of ...

https://www.quora.com/How-many-sides-faces-and-vertices-does-a-tetrahedron-have

Sides and faces are the same regarding polyhedra. You probably mean 'sides, edges and vertices'. Here it is, you can count them.

http://mathworld.wolfram.com/RegularTetrahedron.html

with four polyhedron vertices, six polyhedron edges, and four equivalent equilateral ... The tetrahedron has two distinct nets (Buekenhout and Parker 1998 ). ... is given by the tetrahedral graph, equivalent to the circulant graph Ci_(1,2,3)( 4) ...

https://artofproblemsolving.com/wiki/index.php/Platonic_solid

The tetrahedron has four faces, all of which are triangles. It also has four ... It also has eight vertices and twelve edges. ... It has many interesting properties.

http://www.technologyuk.net/mathematics/geometry/tetrahedron.shtml

It has four (4) faces (the word tetra has its origins in the Greek language, and means four), six (6) edges, and four (4) vertices. What distinguishes the tetrahedron ...

http://eusebeia.dyndns.org/4d/tetrahedron

Mar 13, 2019 ... It has 4 vertices and 6 edges. ... It also occurs as cells in many of the uniform polytopes. The full ... The resulting tetrahedron has edge length 2.

http://www.gwydir.demon.co.uk/jo/solid/tetra.htm

If you were going to be very pedantic, you could describe a cube as a hexahedron, but people tend not to! ... A regular tetrahedron has its faces as equilateral triangles, where all sides are ... How many vertices (corners) and edges are there?

https://www.reference.com/math/many-edges-tetrahedron-92b489b108f39a5e

A tetrahedron is a shape made out of four triangular faces, and it has a total of six edges ... many-edges-tetrahedron ... How Many Vertices Does a Sphere Have?

https://www.kjmaclean.com/Geometry/Tetrahedron.html

The tetrahedron has 6 sides, 4 faces and 4 vertices. In Figure 1 the ... How does the side of the tetrahedron relate to the radius of the sphere? The side of the ...