![]() The number of edges of a polyhedron is two less than the sum of the number of vertices and faces. The line formed when two faces meet., and vertices close vertex The point at which two or more lines intersect (cross or overlap). The properties of a polyhedron are given by its faces close face One of the flat surfaces of a solid shape., edges close Edge The line formed by joining two vertices of a shape. These are the tetrahedron, cube, octahedron, dodecahedron and icosahedron. ![]() Named by the shape of its base, such as square-based or hexagon-based., and the platonic solids close platonic solid A polyhedron with regular polygon faces. Polyhedra include prisms close prism A 3D shape with a constant polygon cross-section., pyramids close pyramid A 3D shape with a polygon-shaped base and a pointed apex. The three dimensions are length, width, and height. (plural ‘polyhedra’) is a fully enclosed 3D shape with faces that are all polygons. A regular polyhedron is a platonic solid. The two dimensions are length and width.Ī polyhedron close polyhedron A closed 3D shape with polygonal faces, straight edges and sharp (pointed) vertices. is a closed 2D shape with straight edges. A polygon close polygon A closed 2D shape bounded by straight lines.
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