document.write( "Question 850285: PLEASSSSEE HELP . Determine the dimensions of a rectangle of area 60 in^2 that is inscribed in a circle or radius 6.5 in. \n" ); document.write( "
Algebra.Com's Answer #512079 by josmiceli(19441)\"\" \"About 
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Let \"+x+\" = one of the dimensions of the rectangle
\n" ); document.write( "\"+60%2Fx+\" = the other dimension
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\n" ); document.write( "The center of the circle that this rectangle is
\n" ); document.write( "inscribed in is located where the diagonals cross
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\n" ); document.write( "The length of a diagonal is:
\n" ); document.write( "\"+d+=+sqrt%28+%28+60%2Fx+%29%5E2+%2B+x%5E2+%29+\"
\n" ); document.write( "\"+d+=+sqrt%28+3600%2Fx%5E2+%2B+x%5E2+%29+\"
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\n" ); document.write( "This diagonal is the same as the diameter of the
\n" ); document.write( "circle, which is
\n" ); document.write( "\"+2r+=+2%2A6.5+\"
\n" ); document.write( "\"+2r+=+13+\"
\n" ); document.write( "Now I can say:
\n" ); document.write( "\"+13+=+sqrt%28+3600%2Fx%5E2+%2B+x%5E2+%29+\"
\n" ); document.write( "Square both sides
\n" ); document.write( "\"+169+=+3600%2Fx%5E2+%2B+x%5E2+\"
\n" ); document.write( "Let \"+x%5E2+=+z+\"
\n" ); document.write( "\"+169+=+3600%2Fz+%2B+z+\"
\n" ); document.write( "Multiply both sides by \"+z+\"
\n" ); document.write( "\"+169z+=+3600+%2B+z%5E2+\"
\n" ); document.write( "\"+z%5E2+-+169z+%2B+3600+\"
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\n" ); document.write( "\"+z+=+%28-b+%2B-+sqrt%28+b%5E2+-+4%2Aa%2Ac+%29%29+%2F+%282%2Aa%29+\"
\n" ); document.write( "\"+a+=+1+\"
\n" ); document.write( "\"+b+=+-169+\"
\n" ); document.write( "\"+c+=+3600+\"
\n" ); document.write( "\"+z+=+%28+169+%2B-+sqrt%28+%28-169%29%5E2+-+4%2A1%2A3600+%29%29+%2F+%282%2A1%29+\"
\n" ); document.write( "\"+z+=+%28+169+%2B-+sqrt%28+28561+-+14400+%29%29+%2F+2+\"
\n" ); document.write( "\"+z+=+%28+169+%2B-+sqrt%28+14161+%29%29+%2F+2+\"
\n" ); document.write( "\"+z+=+%28+169+-+119%29+%2F+2+\"
\n" ); document.write( "\"+z+=++50%2F+2+\"
\n" ); document.write( "\"+z+=+25+\"
\n" ); document.write( "and
\n" ); document.write( "\"+z+=+x%5E2+\"
\n" ); document.write( "\"+x+=+sqrt%2825%29+\"
\n" ); document.write( "\"+x+=+5+\"
\n" ); document.write( "\"+60%2Fx+=+60%2F5+\"
\n" ); document.write( "\"+60%2Fx+=+12+\"
\n" ); document.write( "The dimension are:
\n" ); document.write( " 5 x 12 in2
\n" ); document.write( "check:
\n" ); document.write( "\"+5%2A12+=+60+\"
\n" ); document.write( "OK
\n" ); document.write( "Note that is you go back and pick the
\n" ); document.write( "positive \"+sqrt%28+14161+%29+\", then you
\n" ); document.write( "get the same answers\r
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