A basketball hoop consists of a circular metal rim, typically 18 inches in diameter, attached to a backboard. The hoop is positioned 10 feet above the ground, which is the standard height for competitive play. The backboard is usually made of glass or acrylic, providing a solid surface for rebounds. Basketball hoops are found in various settings, including gyms, parks, and driveways. They can be permanent structures or portable models that can be moved and adjusted in height. The primary purpose of a basketball hoop is to allow players to score points by shooting a basketball through the hoop.