Three regular hexagons meeting at a vertex would form a tessellation. So they would form a plane not a solid.
A triangle, square or pentagon.
A triangle, square or pentagon.
triangles and pentagons
A regular octahedron is one of the platonic solids. Each of its faces is an equilateral triangle.
A cube and a dodecahedron.
Quite simply, it doesn't fulfill the requirements for a "platonic solid", which include the requirement that all bounding areas must be regular polygons. A square is a regular polygon; a rectangle is not.
equilateral triangles and regular pentagons
A triangle, square or pentagon.
A triangle, square or pentagon.
A platonic solid is a special kind of polyhedron. A polyhedron is a 3-D figure whose faces are polygons.In a platonic solid all faces are identical regular polygons. A polyhedron has faces, edges, and vertices. The numbers of each are related by Euler's formula, V+F=E+2
A Platonic solid is a solid all of whose face are regular and congruent polygons.There are five of these:A Tetrahedron. Four faces, each an equilateral triangle.Ad InfoA Hexahedron (Cube). Six faces, each a square.An Octahedron. Eight faces, each an equilateral triangle.A Dodecahedron. Twelve faces, each a regular pentagon.An Icosahedron. Twenty faces, each an equilateral triangle.
triangles and pentagons
The 7-faced solid is called a "hexagonal pyramid."
tetrahedron
A solid with a regular polygon for each face is known as a perfect solid.
A regular octahedron is one of the platonic solids. Each of its faces is an equilateral triangle.
6 faces , including 5 triangles and one hexagon . :)