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It_is_a_triangular_prism.">It_is_a_triangular_prism.">It is a triangular prism.* * * * *While a triangular prism can have equilateral triangle faces, it has more faces that are quadrilateral (or rectangular).A polyhedron with only equilateral triangular faces could be a tetrahedron, an octahedron in the form of a square based dipyramid, or an icosahedron.
There are several triangular polyhedra. The simplest is a tetrahedron with 4 faces, but you can have a triangular dipyramid (two tetrahedra stuck together along one face) which has 6 faces. Then there is the icosahedron with 20 faces. The tetrahedron and icosahedron are Platonic solids, but there are many more.
There are several but there is one that comes to mind that has 20 congruent triangular faces called an icosahedron.
look at ask or google to find an answer * * * * * A polyhedron with equilateral triangular faces is called a deltahedron. There are infinitely many of them but only 8 convex ones. The following three are regular: tetrahedron, octahedron and icosahedron. There are 5 more convex polyhedra which are convex but not regular (because they have differing number of faces meeting at their vertices) These are Johnson deltahedra (see link).
An octahedron is an eight sided polyhedron. It has eight sides or faces, 12 edges, and six vertexes. Please see the Related Link below for more information and a picture.
A dodecahedron
A nonagon (9 sides) for example.
octahedron
Hexahedron
An icosahedron is a shape with 20 triangular faces - not more nor fewer. It can, therefore, have only 20 tall isosceles triangular faces.
An icosahedron is a shape with 20 triangular faces - not more nor fewer. It can, therefore, have only 20 short isosceles triangular faces.
It_is_a_triangular_prism.">It_is_a_triangular_prism.">It is a triangular prism.* * * * *While a triangular prism can have equilateral triangle faces, it has more faces that are quadrilateral (or rectangular).A polyhedron with only equilateral triangular faces could be a tetrahedron, an octahedron in the form of a square based dipyramid, or an icosahedron.
A tetrahedron, a triangle based pyramid, an octahedron, an icosahedron plus many more.
An octahedron, for example. 8 faces, 6 vertices.
The Platonic solids in modern Euclidean geometry are five regular polyhedra. These are three-dimensional objects that are bounded by regular polygonal faces. They are: Tetrahedron (or triangular pyramid): 4 triangular faces; Hexahedron (cube): 6 square faces; Octahedron: 8 triangular faces; Dodecahedron: 12 pentagonal faces; Icosahedron: 20 triangular faces. See link for more.
There are a few families of polyhedra with identical faces. There are none whose faces have 6 or more sides. There is no special name for polyhedra whose faces are pentagons or pentagrams. A dodecahedron is an example. If coplanar faces are disallowed, the only polyhedron with quadrilateral faces are the cube and rhombohedron. There are infinitely many polyhedra with equilateral triangular faces: the tetrahedron, octahedron and icosahedron are examples.
If this is a trick question, the answer could be: (a) a collector of shapes. (b) a cube (hexahedraon), octahedron, dodecahedron, icosahedron since all of them have five equal shapes. They have more, but the question does not preclude more. There is no regular solid (Platonic solid) with 5 equal faces.