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Please could anyone explain this to me :

for the equation of circle :

(x-h)^2 + (y-k)^2 = r^2

I don't understand why the centre of the circle is at the point (h,k) ?

e.g

if (x-2)^2 + (y-k)^2 = 36

(8,0)isa point on the circle ,but 8 is obviously longer than the radius which is 6 ?

Thanks for any help

Roger

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# Math question (equation of circle )

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