Circle Equation Calculator

Circle Equation using (h,k) and(h,k)=(,) and radius (r) =
Diameter PointsA = (,) and B = (,)
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Find the equation of the circle with center (h,k) = (0,0) and radius r =
The standard equation for a circle is (x - h)2 + (y - k)2 = r2

Plugging in our numbers, we get:
(x - 0)2 + (y - 0)2 = 2
(x - 0)2 + (y - 0)2 = 0

Determine the general form of the circle equation given center (h, k) = (0, 0) and radius r = :
Expanding the standard form, we get the general form of x2 + y2 - 2hx - 2ky + h2 + k2 - r2 = 0

Plugging in our values for h,k, and r, we get:
Expanding the standard form, we get the general form of x2 + y2 - 2(0)x - 2(0)y + 02 + 02 - 2 = 0
x2 + y2 = 0
Combining our constants, we have our general form of a circle equation below:
x2 + y2 = 0