document.write( "Question 1180579: write the equation for circle O based on the given information.\r
\n" ); document.write( "\n" ); document.write( "7. points (1, 5) and (1, 11) lie on the diameter of the circle.
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Algebra.Com's Answer #810312 by htmentor(1343)\"\" \"About 
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If those two points lie on the diameter, the midpoint of the line segment
\n" ); document.write( "joining the points will be the center of the circle.
\n" ); document.write( "The midpoint is (1,8), and the radius is (11-5)/2 = 3.
\n" ); document.write( "Thus the equation is (x-1)^2 + (y-8)^2 = 9
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