| 摘要 |
PROBLEM TO BE SOLVED: To provide a string-like member capable of drawing simply lines of a goal area or a penalty area without using a plurality of tape measures or a branched rope, and further capable of specifying simply the position of a penalty mark, in formation of a soccer field.SOLUTION: In a string-like member 11 having three corner marks A, B, C attached thereto, when expressing a length between the corner mark A and the corner mark B as a, a length between the corner mark B and the corner mark C as b, and a length between the corner mark C and the corner mark A as c, each length is calculated so as to satisfy the Pythagorean theorem, and the length b is 5.5 m and the length c is 11 m, or the length b is 4 m and the length c is 8 m.SELECTED DRAWING: Figure 1 |
