It can be but need not be.
Well, a tetrahedron has four sides. A regular tetrahedron is a triangular pyramid.
Yes. A tetrahedron is a closed 3-d shape with 4 triangular faces. In a regular polygon, each of these is an equilateral triangle.
Regular Tetrahedron
A regular tetrahedron (triangular pyramid).
A regular tetrahedron. octahedron, dodecahedron.
Well, a tetrahedron has four sides. A regular tetrahedron is a triangular pyramid.
Yes. A tetrahedron is a closed 3-d shape with 4 triangular faces. In a regular polygon, each of these is an equilateral triangle.
A triangular based based pyramid is a TETRAHEDRON. It becomes a regular tetrahedron if the four triangles, that make up its shape, are REGULAR, that is they are all the same size by area and shape; that is they are congruent. The word 'polyhedron' means a solid shape of any number of sides.
Regular Tetrahedron
A regular tetrahedron (triangular pyramid).
A regular tetrahedron. octahedron, dodecahedron.
A tetrahedron has four triangular faces. It is a three-dimensional geometric shape with four vertices and six edges. Each face is an equilateral triangle in a regular tetrahedron.
A four faced figure is a tetrahedron. If they are all congruent triangles, they are all equilateral triangles and it is a regular tetrahedron - one of the 5 Platonic Solids.
There are many possible shapes. The regular ones amongst them are the tetrahedron, the octahedron and the icosahedron.
A regular tetrahedron (an equilateral triangular pyramid).
zero, for any tetrahedron, not just regular
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.