267.035 (rounded)
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C=pi * d C=pi * 85 pi is approximately 3.141592 85 * 3.14592=267.4032
3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280
C= 2 times pi and C= pi times diameter C= 2 times pi and C= pi times diameter
Area=pi times radius squared Circumference=pi times diameter or pi times radius times two
pi^2