document.write( "Question 386513: can you please help me find the center and radius of a circle that has a diameter with endpoints (-11,-8) and (-3,-2)
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Algebra.Com's Answer #273250 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
Use the midpoint formula to find the center, ( $\"h\"$ , $\"k\"$ )
\n" ); document.write( " $\"h=%28x%5B1%5D%2Bx%5B2%5D%29%2F2=%28-11-3%29%2F2\"$
\n" ); document.write( " $\"k=%28y%5B1%5D%2By%5B2%5D%29%2F2=%28-8-2%29%2F2\"$
\n" ); document.write( "Use the distance formula to find the diameter, $\"D\"$ .
\n" ); document.write( " $\"D%5E2=%28x%5B2%5D-x%5B1%5D%29%5E2%2B%28y%5B2%5D-y%5B1%5D%29%5E2\"$
\n" ); document.write( " $\"D%5E2=%28-11-%28-3%29%29%5E2%2B%28-8-%28-2%29%29%5E2\"$
\n" ); document.write( " $\"D%5E2=%28-11%2B3%29%5E2%2B%28-8%2B2%29%5E2\"$
\n" ); document.write( " $\"D=sqrt%28%28-11%2B3%29%5E2%2B%28-8%2B2%29%5E2%29\"$
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\n" ); document.write( "Then plug those values into the general equation for a circle centered at ( $\"h\"$ , $\"k\"$ ) with a diameter, $\"D\"$ :
\n" ); document.write( " $\"%28x-h%29%5E2%2B%28y-k%29%5E2=D%5E2%2F4\"$ \r
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