原帖由 jicheng 于 2007-1-4 21:43 发表 " h" E7 ], K8 s* b |1 e3 h, j% L
求:3 n6 e2 E& D( [2 {" |( n( H
1. a 之长度为何?
+ |) @4 E, i8 L0 d a. 9.6477 b. 9.6747 c. 9.67746 h5 }, S. c: i+ B
2. b 之长度为何?
6 s# z9 M% q4 {& p l& v0 H a. 14.5116 b, 14.5161 c. 14.5611
. \- H0 _1 K( p8 B$ ~$ H8 o6 X3. A弧之弧长为何?. o- f7 |1 z6 ]4 M% O' X
a. 27.0034 b. 27.0304 c. 27.0403 ... : A, L& f# X' C" J
jicheng 大哥救命啊,我怎么做这题别的都对,那两个弧长就是不对啊,我把我做的图传上来,你帮我看哈! |