Basketball is a team sport in which two teams, most commonly of five players each, opposing one another on a
rectangular
court, compete with the primary objective of shooting a basketball (approximately 9.4 inches (24 cm) in diameter)
through the defender's hoop (a basket 18 inches (46 cm) in diameter mounted 10 feet (3.048 m) high to a backboard
at each end of the court), while preventing the opposing team from shooting through their own hoop.
Learn more on wikipedia