document.write( "Question 1011586: length?
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Algebra.Com's Answer #627300 by ikleyn(53765) $\"\"$ $\"About$

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\n" ); document.write( "length of EC?
\n" ); document.write( "AD= 11, BD = 3, BC = 12, AE = 9
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document.write( "Hello,\r\n" );
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document.write( "1) In your plot the point A is invisible, but I suspect it is upper vertex.\r\n" );
document.write( "2) You didn't mention that the straight line DE is parallel to BC. \r\n" );
document.write( "   It is important part of the condition.\r\n" );
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document.write( "OK. Now, the triangles ABC and ADE are similar. It gives a proportion\r\n" );
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document.write( " = ,   or    = ,   or    = \r\n" );
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document.write( "where x is an unknown length of EC.\r\n" );
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document.write( "Simplify and solve it for x.\r\n" );
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document.write( "14*9 = 11*(9+x)  ---->  126 = 99 + 11x  ----->  11x = 126-99 = 27  -----> x = .\r\n" );
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document.write( "The data BC = 12 is excessive for this problem.\r\n" );
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