The number of faces is the same as the number of edges of the bases. On the other hand, it is composed of trapezoid-shaped lateral faces. The frustum of a pyramid is a polyhedron made up of two parallel bases with the same number of edges. A Specific Case of Polyhedron: Pyramid Trunk These solids are the triangular pyramid, tetrahedron, cube, octahedron, dodecahedron, and icosahedron. The five convex examples have been known since ancient times called Platonic polyhedra. There are nine regular polyhedra: five convex polyhedra and four-star polyhedra.Ī convex polyhedron is a polyhedron that embeds a convex solid that is, for each pair of points in the shape, the line segment joining them is wholly contained in the solid body.

Regular polyhedra are the most symmetrical.

These types of solid shapes can be classified according to the number of faces. Regular polyhedra are made up of regular polygons. Among them, we can distinguish regular polyhedrons and irregular polyhedra.Ī polyhedron is the equivalent of any polygon in 2D shapes in three-dimensional geometry. Polyhedrons are a particular case of solid shapes whose faces are all polygons. On the other hand, a cube is a polyhedron with six square faces: a geometric solid with height, width, and length. For example, a square is a quadrilateral: a four-sided geometric figure represented on a flat surface. We can easily understand a geometric solid from various examples. The three elements that make up three-dimensional shapes are faces, edges, and vertices. In general, they are 3D shapes that delimit or describe volumes. The main characteristic is that they have three dimensions (height, length, and width) and occupy space. Solid shapes are three-dimensional geometric shapes.

Three dimensional solid shapes