document.write( "Question 450238: Find the radius of a circle:\r
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Algebra.Com's Answer #310616 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
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document.write( "Hi
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document.write( "Standard Form of an Equation of a Circle is 
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document.write( "where Pt(h,k) is the center and r is the radius
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document.write( "x^2 + y^2 + 4x -4y- 1 = 0  |completing squares
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document.write( "(x+2)^2-4 +(y-2)^2-4 -1 = 0
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