【进阶级练习题99】: f* N; u: z1 n$ g0 A9 K# u/ _
* Z! L+ F: V' o8 e. p0 H
求:9 N4 l6 O* T& K$ P/ h
1. AB 之距离为何?$ g5 v7 i- G! d
a. 75.9945 b. 75.9495 c. 75.4995 ) }8 V$ L" t& E/ F2. ∠ABC 之角度值为何?' L4 j. X1 |7 m2 C( k; U/ T
a. 66.1379° b. 66.3179° c. 66.3719°. O, o$ f. B0 K
3. 此图围成之面积为何? ! q) j" z- [ H( U0 \ a. 3741.6436 b. 3741.4636 c. 3741.3466( J I3 \4 Z Y
& P) H# B5 k+ g L
[ 本帖最后由 shaonx 于 2009-6-17 21:49 编辑 ]