This document defines and describes basic geometric shapes including points, lines, planes, angles, triangles, quadrilaterals, polygons, circles, cylinders, and spheres. It explains that a point has no extent, a line is one-dimensional, a plane has infinite length and width but no thickness, and an angle is formed by two rays with the same endpoint. It also defines perpendicular and parallel lines, right triangles, and various polygons with 3 to 8 sides such as triangles, pentagons, hexagons, squares, rectangles, trapezoids, parallelograms, circles, cylinders, spheres, and rhombi.