This document provides an introduction to geometric solids, including naming the five regular polyhedra (tetrahedron, hexahedron, octahedron, dodecahedron, icosahedron). It discusses Euler's formula relating the number of faces, vertices and edges of solids and how this applies to the five regular polyhedra. The document also mentions exploring prisms, pyramids and whether Euler's formula applies to them. Finally, it directs working practice problems and an individual exit slip related to geometric solids.