document.write( "Question 1184227: the center of a circle is at (-3,2) and its radius is 7. Find the length of the chord, which is bisected at (3, 1).
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Algebra.Com's Answer #814752 by MathLover1(20850)\"\" \"About 
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\n" ); document.write( "the center of a circle is at (\"-3\",\"2\") =>\"h=-3\" and \"k=2\"\r
\n" ); document.write( "\n" ); document.write( "and its radius is \"r=7\"\r
\n" ); document.write( "\n" ); document.write( "equation is:\r
\n" ); document.write( "\n" ); document.write( "\"%28x-h%29%5E2%2B%28y-k%29%5E2=r%5E2\"\r
\n" ); document.write( "\n" ); document.write( "\"%28x-%28-3%29%29%5E2%2B%28y-2%29%5E2=7%5E2\"\r
\n" ); document.write( "\n" ); document.write( "\"%28x%2B3%29%5E2%2B%28y-2%29%5E2=49\"\r
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\n" ); document.write( "\n" ); document.write( " Find the length of the chord, which is bisected at (\"3\",\"+1\")\r
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\n" ); document.write( "\n" ); document.write( "if the chord is bisected at (\"3\",\"+1\"), find solutions for intersection of the circle with vertical line x=3\r
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\n" ); document.write( "\n" ); document.write( "\"A\" is the \"midpoint+\"of the chord so angle \"CAB\" is a \"right\" angle.
\n" ); document.write( "Use coordinates (\"-3\",\"2\") and (\"3\",\"1\") to find the length of the line segment \"CA\".
\n" ); document.write( "Now you can use Pythagoras theorem to find the length of the line segment \"AB\", which is \"half\" the length of the chord.\r
\n" ); document.write( "\n" ); document.write( "\"CA\"=distance between points (\"-3\",\"2\") and (\"3\",\"1\")
\n" ); document.write( "\"CA=sqrt%28%283-%28-3%29%29%5E2%2B%281-2%29%5E2%29\"
\n" ); document.write( "\"CA=sqrt%286%5E2%2B1%5E2%29\"
\n" ); document.write( "\"CA=sqrt%2837%29+\"
\n" ); document.write( "\"CB=7\"\r
\n" ); document.write( "\n" ); document.write( "\"%28AB%29%5E2=7%5E2-%28sqrt%2837%29+%29%5E2\"
\n" ); document.write( "\"%28AB%29%5E2=49-37\"
\n" ); document.write( "\"%28AB%29%5E2=12\"
\n" ); document.write( "\"AB+=sqrt%2812%29\"
\n" ); document.write( "\"AB+=2sqrt%283%29\" -> half the length of the chord\r
\n" ); document.write( "\n" ); document.write( "the length of the chord will be \"4sqrt%283%29+\"=>answer\r
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