Triangle (tetrahedron, octahedron, icosahedron) Square (cube) Pentagon (dodecahedron)
They are both 3 dimensional shapes with faces that are polygons.
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
They are both simply connected 3-dimensional shapes, all of whose faces are polygons.
An icosahedron has 20 triangular faces.
Equilateral triangles
regular pentagons.... Kyah!
It has 20 faces
20 faces
Icosahedron are a shape with 20 faces, 30 edges and 12 vertices. All the faces are triangles.
12 faces on a truncated icosahedron are pentagons. (The other 20 faces are hexagons.)
Icosahedron are a shape with 20 faces, 30 edges and 12 vertices. All the faces are triangles.