[problem] in line argument work of the handball court, to provide the aid to be accurate and easily-line argument to the dimensions that are defined without the use of a tape measure. A length that you fixed the connecting fitting 11 and 12 to both ends of the first rope 1 of 20m, and the second rope 2 of 15m, and a third rope 3 Metropolitan of 25m, the first rope ends label from the position of 8.5m is, the second rope, the position of 4m, 6m, 7m, 9m from one end, label, the third rope are attached is labeled at the position of 5m from one end. The combined and one end of the first rope and the other end of the second rope fixed with fixing pins to the point A of the side line AB, the other end of the third rope is fixed by fixing pins made to match one end of the second rope , tensile one end of the third rope is consistent with the other end of the first rope, determines the point C makes a right-angled triangle having a right angle to the point a in the first rope and the second rope and the third rope. .FIELD 4
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