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History has not recorded when the discus throw was invented but it is believed to have been begun by the ancient Greeks. The discus throw was an event of the ancient Olympic Games of Greece held in 776 B.C. The ancient discus was made of stone, iron, bronze, or lead, and was shaped like a flying saucer. The winner of the discus throw was awarded the disc as a prize for winning the event.
Circumference = 2pi*r Circumference = 86pi
circumference of the tire.
circumference = 24.5
Circumference = 12Diameter = Circumference/piRadius = Diameter/2 = circumference/(2 pi) = 1.9099 (rounded)