1、1至25 求周长
3.14 6.28 9.42 12.56 15.7 18.84 21.98 25.12 28.26 31.4 34.54 37.68 40.82 43.96 47.1 50.24 53.38 56.52 59.66 62.8 65.94 69.08 72.22 75.36 78.5
2、26至50求周长
81.64 84.78 87.92 91.06 94.2 97.34 100.5 103.62 106.76 109.9 113.04 116.18 119.32 122.46 125.6 128.74 131.88 135.02 138.16 141.3 144.44 147.58 150.72 153.86 157
3、51至75求周长
160.14 163.28 166.42 169.56 172.7 175.84 178.98 182.12 185.26 188.4 191.54 194.68 197.82 200.96 204.1 207.24 210.38 213.52 216.66 219.8 222.94 226.08 229.22 232.36 235.5
4、76至100求周长
238.64 241.78 244.92 248.06 251.2 254.34 257.48 260.62 263.76 266.9 270.04 273.18 276.32 279.46 282.6 285.74 288.88 292.02 295.16 298.3 301.44 304.58 307.72 310.86 314
1、3.14X 1的2次方=3.143.14X 2的2次方=12.563.14X 3的2次方=28.263.14X 4的2次方=50.243.14X 5的2次方=78.53.14X 6的2次方=113.043.14X 7的2次方=153.863.14X 8的2次方=200.963.14X 9的2次方=254.343.14X 10的2次方=314