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Sagot :
Answer:
A≈1243.4ft²
Step-by-step explanation:
A=πr2
C=2πr
Solving forA
A=C2
4π=1252
4·π≈1243.39799ft²
Answer:
1243.4
Step-by-step explanation:
You can find the area of a circle from circumference with a few different formulae.
c = 2πr, or 19.89 * π = 125
Then, now that you know the radius, you can use the formula A = πr².
1243.4 = 395.79
Hope that this helps!
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