Circle Equation

Circle Equation
Circle equation form:
$$(x-a)^2+(y-b)^2=r^2$$ where:
$(a,~b)$ is circle center, and
$r$ is circle radius.

If we describe the above form, we get: $$x^2+y^2-2ax-2by+a^2+b^2-r^2=0$$ $$x^2+y^2+Ax+By+C=0$$ where:
$A=-2a$, $B=-2b$, and $C=a^2+b^2-r^2$.
Thanks for view, see you and happy learning.

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