SOLUTION: i need to find the center, and radius of this circle x^2+(y-8)^2 = 81 please help

Question 123313: i need to find the center, and radius of this circle
x^2+(y-8)^2 = 81
please help
Answer by chitra(359) (Show Source): You can put this solution on YOUR website!
The given expression can be written as:

This can be written as:

Comparing this with the standard equation:

Here the centre is (h, k) and "r" is the radius.

So we get: Center = (h,k) = (0, 8) and r^2 = 81

Therfore radius, r = 9 units

Hence, the solution.

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