第1个回答 2009-10-17
1平角=180度,1平角=2直角。圆柱体积=底面积*高/3 1^2=1,2^2=4,3^2=9,4^2=16,5^2=25,6^2=36,7^2=49,8^2=64,9^2=81,10^2=100,11^2=121,12^2=144,13^2=169,14^2=196,15^2=225,16^2=256,17^2=289,18^2=324,19^2=361,20^2=400,21^2=441,22^2=484,23^2=529,24^2=576,25^2=625,26^2=676,27^2=729,28^2=784,29^=841,30^2=900,三角形面积=底乘高/2本回答被提问者采纳