练习题95答案: . P! B; E: m& j0 ?1 E& o' h* |1. a 弧之长度为何?$ P) i# G x4 Z0 p( r5 t
a. 69.46525 J8 X8 \: \5 s/ `
2. b 之半径值为何?8 N" ~! F- N+ O4 F% _- A
b. 8.51844 \& t/ `/ n% i* V
3. DE 之距离为何? 8 J9 Z5 I& A& i* I* g) }5 P c. 52.43393 N; A$ l! e4 v7 H; o M; P
4. ∠ABC 之角度值为何?4 \% x y- s: I
a. 87.0561°/ W# H" V; l% ~ N
5. 剖面线区域之面积为何? / w5 a2 H+ X) s c6 i" t b. 1321.4085