Equations of a Circle in standard form

d

Standard equation

$(1).\,\,\,$ $(x-a)^2+(y-b)^2$ $\,=\,$ $r^2$

$(2).\,\,\,$ $(x-h)^2+(y-k)^2$ $\,=\,$ $r^2$

Learn the equation of a circle in standard form and geometric proof in the two dimensional space.

Centered at the Origin

$x^2+y^2$ $\,=\,$ $r^2$

Learn the standard equation of a circle centered at the origin of the two dimensional cartesian coordinate system with geometrical proof.