what is the diameter of the basketball rim
Backboard (basketball) The top of the hoop is 10 feet (305 cm) above the ground. Regulation backboards are 72 inches (183 cm) wide by 42 inches (110 cm) tall. All basketball rims (hoops) are 18 inches (46 cm) in diameter. The inner rectangle on the backboard is 24 inches (61 cm) wide by 18 inches (46 cm) tall.[1]
Women's basketball Most high school games are played with four 8-minute quarters, while NCAA, WNBA, and FIBA games are played in four 10 minute quarters. In 2015-2016 the NCAA changed the rules to 10 minute quarters from 20 minute halves.[4]
Basketball court Basketball courts come in different sizes. In the National Basketball Association (NBA), the court is 94 by 50 feet (28.7 by 15.2 m). Under International Basketball Federation (FIBA) rules,[1] the court is minutely smaller, measuring exactly 28 by 15 metres (91.9 by 49.2 ft). A high school court is slightly smaller, at 84 by 50 feet (25.6 by 15.2 m).[citation needed] In amateur basketball, court sizes vary widely. The baskets are always 10 feet (3.0 m) above the floor (except possibly in youth competition). Basketball courts have a three-point arc at both baskets. A basket made from behind this arc is worth three points; a basket made from within this line, or with a player's foot touching the line, is worth 2 points. The free-throw line, where one stands while taking a foul shot, is located within the three-point arc at 15 feet from the basket. A foul shot is worth 1 point, but if a shot is made from the foul line while in play it is still worth 2 points.[2]
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