How many faces does an icosahedron possess?

An icosahedron is one of the five Platonic solids, which are highly symmetrical, three-dimensional shapes made up of identical faces. Specifically, an icosahedron is characterized by having 20 triangular faces. Each of these faces is an equilateral triangle, and the structure is designed so that 12 vertices and 30 edges also define it.

The number of faces is a key attribute of polyhedra and plays a crucial role in understanding their geometry. In the case of an icosahedron, this characteristic allows it to possess a high degree of symmetry and a unique visual appeal, making it a common model in various fields, including mathematics, art, and science. This perfect balance of faces contributes to its classification as a Platonic solid, where all faces are congruent and the same number of faces meet at each vertex.

Thus, the correct answer, which indicates that an icosahedron has 20 faces, highlights its distinct geometric properties.