Which circle has the largest circumference?

Question

x2 + y2 = 8
(x – 3)2 + y2 = 10
(x + 3)2 + (y + 2)2 = 4
x2 + (y – 2)2 = radical 81

Answer 1

since √81 = 9, I'd say the winner is #2

10 is the largest of 8,10,4,9

largest radius means largest circumference.

Answer 2

need answer

Answer 3

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