cdddd
: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$= 3$I 1.732/2*l*l/2=3.14/4*de*de
>j*0fb!:] de=1.732/3.14l=0.55159l=0.743l
[*I7^h% https://max.book118.com/html/2017/0328/97441406.shtm
bj0<A http://www.doc88.com/p-9959653916329.html
(w\|yPBB .......
(2018-05-12 21:26)
?^MH:o