Question 1189936
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The form for the equation is<br>
{{{(x-h)^2+(y-k)^2=r^2}}}<br>
where (h,k) is the center and r is the radius.<br>
The given vertices describe a square with side length 6.  The center of the circle is the center of the square.<br>
(1) Draw a sketch using the given vertices
(2) Determine the center (h,k)
(3) The radius r is the distance from the center to any of the vertices -- or, if you prefer, it is half the length of the diagonal of the square<br>
You now have h, k, and r -- write the equation.<br>