【进阶级练习题29】) r' V' ?9 `% c |7 x9 r
原创:Joseflin先生(台湾) 整理:SHAONX(上海)% t" E& s8 O6 R4 f! N c# s3 O
, Q W( p& a4 r @: r0 _* U5 ^
求: _+ E- L9 X, z1 F% P
1. a之长度值为何? j' A+ D- G7 w5 z/ |0 l6 a a. 173.2051 b. 173.2150 c. 173.25012 L/ o& e+ A% C. p
2.AD之距离为何? 9 }9 M6 F2 x: E5 g) R9 L ? a. 312.2499 b. 312.2949 c. 312.2994! {. Z6 M9 e* ~: E* c/ q& Q+ _
3. ∠ABC角度值为何? {" \" D/ P5 Y$ M1 w6 _0 t a. 51.778° b. 51.787° c. 51.877°( G* i. E: X8 Z2 |. X
4. 蓝色区域之面积为何? 2 f1 H/ w6 Y9 t0 K' q a. 64951.3509 b. 64951.5309 c. 64951.9053