* E. o; Z7 r7 X$ f% g5 p求:( _4 T) y5 V) s6 x. m7 [1 W$ s
1. BC之距离为何?, Q% U# L. }0 [8 d
a. 47.0246 b. 47.0426 c. 47.0642% ]* L/ w9 g1 e8 Y8 G- m. h% B
2. <ABC角度值为何?1 S/ x Y9 S' p) o
a. 93.085 ° b. 93.580° c. 93.850°" d1 N3 n+ x' i
3. 绿色剖面线区域之周长为何? + G+ V% ]; F' |, y" R a. 90.3283 b. 90.3832 c. 90.8233 ( n8 m S7 f$ u8 x; e4. 扣除绿色剖面区域之面积为何? / U( s; V- z, B8 U" y a. 1338.4145 b. 1338.4415 c. 1338.4514$ N! S; \0 `7 B) m- s