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某开发小区楼前欲建一个正五边形花园广场,边长已知,由于距离近,使用经纬仪放线反而更烦琐。现只用钢尺、小线、计算器定位放线,这样既弥补了使用经纬仪操作带来的测角误差,操作又非常简便。口诀:九五顶六零,八零两边分。具体步骤如下。 1.根据勾股定理,用小线和钢尺在地上作两条互相垂直的线段,按已知边长的80％、60％、80％和95％在地上钉出C、D、E、F4根桩,如图1所示。
In front of a development area, a square-shaped pentagonal garden square is to be built. The length of the side is known. Because of the distance, the use of a theodolite is more complicated. Now only use steel ruler, small line, and calculator to position the line, which not only compensates for the angle error caused by the use of theodolite operation, but also is very simple to operate. The word of mouth: ninety-five top sixty, eighty and two points. Specific steps are as follows. 1. According to the Pythagorean theorem, use a small line and a ruler to make two mutually perpendicular segments on the ground, pinning out C, D, E on the ground at 80%, 60%, 80%, and 95% of the known side lengths. F4 piles, as shown in Figure 1.