Question 314652
The general equation for a circle centered at (h,k) with a radius R is:
{{{(x-h)^2+(y-k)^2=R^2}}}
Since it's touching the x-axis, the distance from the center to the x-axis is R.
{{{R=12}}}
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{{{(x-8)^2+(y-12)^2=144}}}
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{{{drawing(300,300,-5,30,-5,30,circle(8,12,.3), grid(1),circle(8,12,12),graph(300,300 ,-5,30,-5,30,0))}}}