The regulation height above the ground for the rim (hoop) is 10 feet, and the rim is 18 inches in diameter. Backboards are 6 feet wide (72 inches) by 42 inches tall, with the inner square being 24 inches wide by 18 inches tall.
The Foul LineFor all size courts the 'foul line' is 15 feet in front of the backboard.
The KeyThe key is 12 feet wide, and is the same for all Basketball courts. The backboard extends 4 feet out over the baseline into the key. A half circle of diameter 6 foot extends from the foul line away from the basket to complete the key.
The 3 Point Line (Arc)For NBA Basketball Courts the 3 point arc is 22 feet to the center of the rim on the sides with a straight line extending out 16 feet 9 inches from the baseline. Past those points the line extends out 23 feet 9 inches from the center of the rim.
Line MarkingsAll line markings on the floor are 2 inches wide and can vary in color.
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A basketball court is needed for basketball. For makeshift play, you need a large, flat space with an elevated hoop of some kind.
you need a wooden floored court with two hoops and if you want to play out side you need a concrete surface so you bounce the ball :)