5 P6 T7 i1 {$ T7 J/ @6 \9 S求: ; |7 E9 ^% L$ j% d |1. a 之角度值为何?) P# @% v# Q* `, b' L8 _( X6 s( K
a. 140.0000° b. 140.0001° c. 140.0002° 6 r5 Q* M1 B5 W8 l1 S2. b之长度为何? 1 G) H8 ?6 ?$ N! E+ L a. 97.8566 b. 97.8556 c. 97.8546 # ?2 ?7 W" t5 g4 S3. c 之长度为何? $ H3 F& a" K# d& S y a. 75.6886 b. 75.6868 c. 75.6688 4 k5 \2 o: Q3 v5 ?/ U5 V! Q4 x, Y. y4. ∠ABC 之角度值为何?. T' J! O+ O" n$ s
a. 88.4449° b. 88.4494° c. 88.4944°" T4 X K/ j' s/ ]( ] R9 A/ U
5. 剖面线区域之面积为何?$ l+ x5 L9 w& o/ k5 W
a. 6667.6067 b. 6667.6607 c. 6667.6670