原帖由 jicheng 于 2007-1-4 21:43 发表 0 m6 n2 E G1 n2 b
求:! l& _# ^0 y( ~' A
1. a 之长度为何?( m9 N- K* F- n$ {6 q
a. 9.6477 b. 9.6747 c. 9.6774! A% B) i" A: q: D T* I
2. b 之长度为何?7 B4 N, L% F& A3 ^0 G4 {7 N+ r
a. 14.5116 b, 14.5161 c. 14.5611
- C) K: m* |. b& K, A% _ Y: O3. A弧之弧长为何?
, G9 L6 q! o. N. M5 L. y a. 27.0034 b. 27.0304 c. 27.0403 ...
# N+ L5 l/ v/ l: Gjicheng 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! |