Geometry HELP
posted by Ariel .
What is the equation for a circle with a diameter having the following endpoints: N(0,1) and Q(18,1)?
a.)(x  9)^2 + (y  1)^2 = 81
b.)(x + 2)^2 + (y  7)^2 = 56
c.)(x)^2 + (y)^2 = 72

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Answer
a.)(x  9)^2 + (y  1)^2 = 81