Question 258586
The ordered pair (-3,2) lies on a circle with center (0,3). What is the equation of the circle? i dont get how to work this problem out can i please get help?
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The distance from the point to the center is the radius.  Find the distance.
r^2 = diffy^2 + diffx^2
r^2 = 1 + 9 = 10
The distance squared is ok.
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The eqn for a circle of radius r, with its center at (h,k) is:
(x-h)^2 + (y-k)^2 = r^2
--> x^2 + (y-3)^2 = 10