" o. @, a+ H8 K {. P求:) B! |8 J6 o9 E' @) c% B+ |' A8 F
1. a 弧之长度为何? ( r6 j# o' c0 f- ]( o$ J a. 69.4652 b. 69.6452 c. 69.5642 * W& Z0 a1 N& A0 N2. b 之半径值为何? & Z, G: R% N+ @- N& ?9 n a. 8.1584 b. 8.5184 c. 8.81540 h$ A4 v" A% |* F
3. DE 之距离为何?$ Z; f4 t! l* O+ }2 ?0 x
a. 52.3349 b. 52.3439 c. 52.4339% B! p5 g/ ?0 s0 y! e- t
4. ∠ABC 之角度值为何?7 r& f" d0 \! a3 j( L
a. 87.0561° b. 87.5061° c. 87.6510° 8 C: I: w6 |0 z5. 剖面线区域之面积为何? 7 e$ P4 k5 ~0 T2 v a. 1321.0485 b. 1321.4085 c. 1321.8405