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OpenStudy (anonymous):
What is the diameter of the following circle: (x + 4)2 + (y – 9)2 = 18
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OpenStudy (user917):
from the last equation (general equation of the circle) we can conclude that r^2=18 that mean r=sqrt(18) and then the diameter is twice r that means : diameter=2sqrt(18)=6sqrt(2).
OpenStudy (anonymous):
2 × √18 = 6√2 so the diameter would be = 8.485 ?
OpenStudy (anonymous):
Am I correct?
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