单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,85.96m,72.6m,1.25m,两个半圆形跑道合起来就是一个圆，求出圆周长。,两条直道长度,每条跑道长度,第1页,第1页,每条跑道长度,1,2,3,4,5,6,直径m,72.6,75.1,77.6,80.1,82.6,85.1,周长m,227.964,235.814,243.664,251.514,259.364,267.214,全长m,399.884,407.734,415.584,423.434,431.284,439.134,第2页,第2页,