摘要
本文依据平面几何图形中求扇形弧长的公式:L=nπR/180,推导出直接简便地求某段弧长所对角度的方法,将所求角度代入下一步运算公式就可求得某一径赛项目分道线的放射点位置。使用CASIO fx—180P机,依据计算步骤,设计计算程序进行教学,使学生通过自己的操作运算,较快地掌握运算方法,提高在实地场地测画中的能力,从而,显著地提高了教学效果。
According to the formula calculating are length of the sector in plane geometry: L=nπR/180, the paper introduces a brief method to calculate the are length of any section against the angle directly and then put it in the further operation formula, thus we can achieve the position of the track radiate point of any track events According to the calculating steps and programming we could use Machine CASIO fx—180P to teach students how to use this method to operate the machine themselves with the following advantages students master the method in a quicker way, raise their ability of rang finding on the spot on the ground obviously, this method results in greater educational effects.
关键词
田径
教学
运动场地
程序设计
Track and field, research in education, calculation of the sportsground.
