The faces of a tetrahedron are all triangular polygons. Specifically, a regular tetrahedron has equilateral triangles as its faces, while an irregular tetrahedron can have any type of triangle as its faces, but they will always be triangular in shape. Each tetrahedron has four triangular faces, four vertices, and six edges.
equilateral triangles
Triangle (tetrahedron, octahedron, icosahedron) Square (cube) Pentagon (dodecahedron)
You need at least 4 faces for a pyramid. That type is known as Tetrahedron (http:/en.wikipedia.org/wiki/Tetrahedron)
There are four number of faces in a tetrahedron.
Because a tetrahedron is a triangular based pyramid that has 4 identical faces and 4 faces meet at all the vertices.
equilateral triangles-Apex ;)
equilateral triangles-Apex ;)
There are points (vertices) lines (edges) and polygons (faces).
equilateral triangles
Triangle (tetrahedron, octahedron, icosahedron) Square (cube) Pentagon (dodecahedron)
You need at least 4 faces for a pyramid. That type is known as Tetrahedron (http:/en.wikipedia.org/wiki/Tetrahedron)
pentagons
A tetrahedron has 4 faces.
A tetrahedron has four faces.
The polygons are the equilateral triangle, the square, and the regular pentagon. The faces of these platonic solids are made from the following polygons: tetrahedron - 4 triangles cube - 6 squares octahedron - 8 triangles dodecahedron - 12 pentagons icosahedron - 20 triangles
Equilateral triangles
Polygons aren't normally described as having faces Polyhedrons are normally described as having faces So it could be a tetrahedron which is a triangular based pyramid