1、1,=3.14,2,=6.24,3,=9.42,4,=12.56,5,=15.7,6,=18.84,7,=21.98,8,=25.12,9,=28.26,10,=31.4,11,=34.54,12,=37.68,13,=40.82,14,=43.96,15,=47.1,16,=50.24,18,=56.52,20,=62.8,25,=78.5,30,=94.2,36,=113.04,49,=153.86,64,=200.96,81,=254.34,100,=31.4,2=,4,=12.56,3=,9,=28.26,4=,16,=50.24,5=,25,=78.5,6=,36,=113.04,7
2、=,49,=153.86,8=,64,=200.96,9=,81,=254.34,常见的值【一】 1= 3.14 2= 6.28 3= 9.42 4= 12.56 5= 15.7 6= 18.84 7= 21.98 8= 25.12 9= 28.26 10= 31.4 12= 37.68 14= 43.96 15= 47.1 16= 50.24 18= 56.52 19= 59.66 20= 62.8 24= 75.36 25=78.5 32=100.48 36=113.04 64= 200.96 81= 254.34,2=4= 12.56 3=9= 28.26 4=16= 50.24 5=25=78.5 6=36=113.04 7=49=153.86 8=64= 200.96 9=81= 254.34 10=100=314,
