document.write( "Question 1185136: 1. The triangle has an area of 2500 m2. The sides are in the ratio 5:10:11. Find the following
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\n" ); document.write( "e) Radius of the circumcircle
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Algebra.Com's Answer #815900 by ikleyn(52786)\"\" \"About 
You can put this solution on YOUR website!
The triangle has an area of 2500 m2. The sides are in the ratio 5:10:11. Find the following
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\n" ); document.write( "d) Radius of the incircle)
\n" ); document.write( "e) Radius of the circumcircle
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document.write( "From the condition, the sides are a = 5x, b = 10x and c = 11x units long.\r\n" );
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document.write( "Apply the Heron's formula for the area of a triangle.\r\n" );
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document.write( "Semi-perimeter is  s = \"%285x+%2B+10x+%2B+11x%29%2F2\" = 13x.\r\n" );
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document.write( "                       s - a = 13x -  5x = 8x\r\n" );
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document.write( "                       s - b = 13x - 10x = 3x\r\n" );
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document.write( "                       s - c = 13x - 11x = 2x\r\n" );
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document.write( "According to the Heron's formula, the area of the triangle is\r\n" );
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document.write( "    area = \"sqrt%28s%2A%28s-a%29%2A%28s-b%29%2A%28s-c%29%29\" = \"x%5E2%2Asqrt%2813%2A8%2A3%2A2%29\" = \"4x%5E2%2Asqrt%2839%29\".\r\n" );
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document.write( "So, the \"area\" equation to find x is\r\n" );
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document.write( "    \"4x%5E2%2Asqrt%2839%29\" = 2500.\r\n" );
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document.write( "From the equation,  x^2 = \"625%2Fsqrt%2839%29\";    x = \"25%2Froot%284%2C39%29\".\r\n" );
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document.write( "Hence, the sides are  a =  5x = \"125%2Froot%284%2C39%29\";  \r\n" );
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document.write( "                      b = 10x = \"250%2Froot%284%2C39%29\";\r\n" );
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document.write( "                      c = 11x = \"275%2Froot%284%2C39%29\".\r\n" );
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document.write( "The longest side is c = 11x = \"275%2Froot%284%2C39%29\".      <<<---===  It is the ANSWER to question (a).\r\n" );
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document.write( "Find the altitude  \"h%5Bc%5D\" drawn to this side from the area equation\r\n" );
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document.write( "     \"%281%2F2%29%2Ac%2Ah%5Bc%5D\" = 2500,  \r\n" );
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document.write( "which gives  \r\n" );
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document.write( "     \"h%5Bc%5D\" = \"5000%2F%28%28275%2Froot%284%2C39%29%29%29\" = \"%28200%2F11%29%2Aroot%284%2C39%29\".      <<<---===  It is the ANSWER to question (c).\r\n" );
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document.write( "The radius of the incircle (inscribed circle) is\r\n" );
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document.write( "    r = \"area%2Fsemiperimeter\" = \"2500%2F%2813x%29\" = \"2500%2F%2813%2A%2825%2Froot%284%2C39%29%29%29\" = \"%28100%2F13%29%2Aroot%284%2C39%29\".      <<<---===  It is the ANSWER to question (d).\r\n" );
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document.write( "The radius of the circumscribed circle is\r\n" );
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document.write( "    R = \"%28a%2Ab%2Ac%29%2F%284%2Aarea%29\",\r\n" );
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document.write( "and you just have EVERYTHING from me to complete this calculation ON YOUR OWN.\r\n" );
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\n" ); document.write( "\n" ); document.write( "PLEASE  next time do not place so many assignments/questions into one post.\r
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\n" ); document.write( "\n" ); document.write( "It  ALWAYS  works against your own interests.\r
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