document.write( "Question 389980: find the radius of the circle passing through point (-2,10) and having a center at(4, -2). write an equation for the circle. \n" ); document.write( "

Algebra.Com's Answer #276465 by ewatrrr(24785) $\"\"$ $\"About$

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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-4)^2 + (y+2)^2 = r^2
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document.write( "finding r as  distance between points (-2,10) and (4, -2). 
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document.write( " r^2 =  6^2  + (-12)^2 = 180    r = 13.4
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document.write( "    (x-4)^2 + (y+2)^2 = 180 
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