【进阶级练习题70】 " @/ K+ u7 I# I + e4 D& ]8 w4 s d6 x求:0 \7 B5 `# Z d5 n0 K3 F5 F1 n
1. ∠b弧之角度值为何? # Q3 m; [& E% g6 K a.68.557° b. 68.575° c.68.755°; t- B! ?% M6 _' Y1 s" R
2. c 弧之长度为何? 8 O6 D6 W }) ]9 N7 @+ N1 [* S a. 68.4057 b. 68.4750 c. 68.45073 h( |" j' }1 n& o, e
3. d 之半径值为何?& f8 x- q( l9 B" R- F7 R1 Y
a. 14.1085 b. 14.1508 c. 14.18502 F1 n$ ?' w! p
4. e 弧之长度为何?1 [* n$ D2 Z$ N) i' F! h+ n
a.99.4029 b.99.4209 c.99.2409 2 g: S' o E0 q& s$ E. N5. f 之长度为何?5 a; l; x3 _; r4 Q% K
a. 41.2925 b. 41.2295 c. 41.2529' a3 _% f U- K* n
1. c.68.755° 8 p c- @6 a& Q2 c2. b. 68.4750 . e; p0 ` p7 C* A) s8 q
3. a. 14.1085 5 x' F- [0 t C8 p2 g \5 }3 R) x
4. a.99.4029 R c' {: ?) E. g, b. Z
5. c. 41.2529