document.write( "Question 889557: A circle is inscribed in a square with vertices(-9,-3),(-1,-3),(-9,5) and (-1,5).
\n" ); document.write( "A)find the coordinates of the center of the circle
\n" ); document.write( "B)find the area of the circle
\n" ); document.write( "C) find the radius of a circle circumscribed about the square
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Algebra.Com's Answer #538252 by josgarithmetic(39618)\"\" \"About 
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More than one way to do this. Look for the midpoint of any pair of opposite corners. Use distance formula to find half the length of a diagonal.\r
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\n" ); document.write( "\n" ); document.write( "A pair of opposite corners is (-1,-3) and (-9,5).\r
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\n" ); document.write( "\n" ); document.write( "Center point should be at \"x=%28-1-9%29%2F2=-4\" and \"y=%28-3%2B5%29%2F2=1\"\r
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\n" ); document.write( "\n" ); document.write( "Diagonal length, \"sqrt%28%28-1-%28-9%29%29%5E2%2B%28-3-5%29%5E2%29\"
\n" ); document.write( "\"sqrt%28%288%29%5E2%2B%28-8%29%5E2%29\"
\n" ); document.write( "\"sqrt%28128%29\"
\n" ); document.write( "\"sqrt%2864%2A2%29\"
\n" ); document.write( "\"8%2Asqrt%282%29\"
\n" ); document.write( "HALF of that is \"highlight_green%284%2Asqrt%282%29%29\". This is also the size of the radius of the circle.\r
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\n" ); document.write( "\n" ); document.write( "Equation for the circle is \"highlight%28%28x%2B4%29%5E2%2B%28x-1%29%5E2=%284sqrt%282%29%29%5E2%29\".
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