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document.write( "We mark the line off with 32 marks, with A at 0 and B at 32.\r\n" );
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document.write( "C is the midpoint of AB,\r\n" );
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document.write( "So we mark C at the 16 marker.\r\n" );
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document.write( "D is the midpoint of AC,\r\n" );
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document.write( "So we mark D at the 8 marker.\r\n" );
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document.write( "E is the midpoint of AD,\r\n" );
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document.write( "So we mark E at the 4 marker.\r\n" );
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document.write( "F is the midpoint of ED,\r\n" );
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document.write( "So we mark F at the 6 marker.\r\n" );
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document.write( "G is the midpoint of EF,\r\n" );
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document.write( "So we mark G at the 5 marker.\r\n" );
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document.write( "H is the midpoint of DB,\r\n" );
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document.write( "We observe that D is at 8, and that B is at 32. So their midpoint is at\r\n" );
document.write( "their average, (8+32)/2 = 20 \r\n" );
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document.write( "So we mark H at the 20 marker.\r\n" );
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document.write( "If DC=56, what is GH?\r\n" );
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document.write( "D is at 8 and C is at 16. That's 16-8=8 units on our scale. Since DC=56, \r\n" );
document.write( "Each of the units on our scale here counts 56/8=7 on the scale of the\r\n" );
document.write( "problem. \r\n" );
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document.write( "G is at 5, and H is at 20. That's 20-5=15 units on our scale, and since\r\n" );
document.write( "each unit on our scale is 7 units on the scale of the problem, the answer is\r\n" );
document.write( "15∙7 = 105 on the scale of the problem. \r\n" );
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document.write( "Edwin
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