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3 years ago

9

A certain coin is a circle with diameter 18mm. What is the exact area of either face of the coin in terms of

1 answer:

attashe74 [19]3 years ago

6 0

Area=pir^2
d/2=r
given
d=18
d/2=18/2=9

area=pi9^2=81pi mm²
the exact value is 81π mm²

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