【进阶级练习题32】( I6 d F& X" y. M, i$ l; F
原创:Joseflin先生(台湾) 整理:SHAONX(上海)) H9 g8 a8 F7 v
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求:2 C" v3 W4 Y5 W' b: V
1. a 之角度值为何? 1 k6 V& _1 p: u+ b. {& H a. 140.0000° b. 140.0001° c. 140.0002° 4 m5 k4 D* n6 f
2. b之长度为何? 6 _7 p0 z* Y) ^' H a. 97.8566 b. 97.8556 c. 97.8546$ h2 _6 e5 _- y7 c$ W- v
3. c 之长度为何? # i9 J* e: p& C) ?/ p3 R) p a. 75.6886 b. 75.6868 c. 75.6688 # {" [, B r6 {. f! g4. ∠ABC 之角度值为何? . b+ j8 x6 J2 [- y$ @$ W a. 88.4449° b. 88.4494° c. 88.4944° - G/ }9 O) Y7 C5 m$ Y5 H5. 剖面线区域之面积为何? # D; I* [& |7 }/ ]+ a a. 6667.6067 b. 6667.6607 c. 6667.6670