A geometric solid is a three-dimensional shape that has length, width, and height. These shapes can be classified into various categories, such as cubes, spheres, cylinders, and pyramids. Each type of geometric solid has specific properties, including the number of faces, edges, and vertices. Geometric solids are important in mathematics and are used in various fields, including architecture, engineering, and art. Understanding these shapes helps in visualizing space and solving problems related to volume and surface area. They are fundamental concepts in geometry, a branch of mathematics that studies shapes and their properties.