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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.
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What is the polyhedron with 6 faces?
hexahedron ex:cube, triangular dipyramid, triangular deltohedron, pentagonal pyramid
What is a polyhedron with 4 equilateral triangle faces?
Tetrahedron - a pyramid with a triangular base.
What kind of base does a regular pyramid have?
A regular pyramid has an equilateral triangular base
What is a polyhedron having a polygon for a base and triangular sides with a common vertex?
A pyramid fits the given description
Is a regular polyhedron a pyramid?
There are five regular polyhedra, also known as the Platonic solids. They are three-dimensional shapes where all of the faces are made up of the same regular polygon.They are:Tetrahedron with four faces (this one is like a pyramid, but with an equilateral triangle for the base and all of the faces)Cube with six faces (all squares)Octahedron with eight faces (all equilateral triangles)Dodecahedron with 12 faces (all regular pentagons)Icosahedron with 20 faces (all equilateral triangles)A square pyramid (like the Egyptian pyramids) is not a regular polyhedron, because it has two different types of regular polygons for faces.
