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professor190 [17]
3 years ago
10

Which is the area of a circle with a circumference of 15.7 units (use 3.14 for pie

Mathematics
1 answer:
anzhelika [568]3 years ago
4 0
C=2pir
15.7=2pir
divide by 2
7.85=pir
divide both sidse by pi
7.85/pi=r

ok so
area=pir^2
area=pi(7.85/pi)^2
area=pi(61.6225/(pi^2))
area=61.6225/pi
use 3.14 for pi
area=61.6225/3.14
area=19.625 square units
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