The document introduces various geometric shapes and provides examples of how each shape appears at a natatorium, which is a large indoor swimming pool facility. Key shapes discussed include: points (buoys on lane lines), lines (lane lines), planes (the pool surface), angles (diving board rails), perpendicular and parallel lines (lines at the bottom and sides of the pool), triangles (flags across the pool), right triangles (belting rigs for practicing dives), and circles, cylinders, spheres, ovals, cones (various training equipment used by swimmers and divers).
![Why a natatorium you might ask? ,[object Object]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)