A backboard is a flat, vertical surface used in sports like basketball to support the hoop. It is typically made of materials such as glass, acrylic, or wood, and is designed to help players rebound the ball and make shots. The backboard is positioned 10 feet above the ground, directly behind the hoop, and its size can vary depending on the level of play. In addition to basketball, backboards are also used in other sports, such as handball and racquetball, where they serve a similar purpose of aiding in gameplay. The design and material of a backboard can affect the ball's bounce and trajectory, making it an important element in sports that utilize it.