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:π是圆周率,等于3.14,r是圆的半径应用实例:圆的半径r是3米,面积S=π×r^2=3.14x3^2=28.26平方米
p*8=($j4 1.732/2*l*l/2=3.14/4*de*de
rMdOE&5G de=1.732/3.14l=0.55159l=0.743l
[y W0U:m https://max.book118.com/html/2017/0328/97441406.shtm
D0.7an6 http://www.doc88.com/p-9959653916329.html
DrC4oxS 1 .......
(2018-05-12 21:26) */u_RJ