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Find the Circumference of the circle: (x+3)^2 + (y-5)^2=81
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Find the Circumference of the circle: (x+3)^2 + (y-5)^2=81

User Zudokod
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C=2\pi r\\\\ (x+3)^2 + (y-5)^2=81 \Rightarrow r=√(81)=9\\ C=2\pi \cdot9\\ \boxed{C=18\pi}
User Boy
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