【进阶级练习题96】 2 t d4 R# s" W; t# F) W # Q$ g% [; }8 N" A8 m' B1 _求:; h% r, ~$ X; s6 S7 Y7 R
1. BC 之长度为何? M q( E5 _8 I( ^% J$ [$ n5 n a. 62.8677 b. 62.8767 c. 62.87760 p0 n0 q# f; ]% E
2. a 弧之长度为何?/ y+ I5 @$ C/ O" f
a. 106.7237 b. 106.7327 c. 106.7723 * S2 D' `7 ~) g1 V3. ∠ADE 之角度值为何?) Q! K Y; ]( w7 O6 S
a. 54.487° b. 54.748° c. 54.874° 8 y/ h. k8 D( ^4. f 之半径值为何?7 `' c7 i1 n4 g; M- o) l5 j, `6 d# P
a. 9.9064 b. 9.9406 c. 9.9604 & _* o) s: q1 u: }: {5. g 之半径值为何? 6 Y3 R9 @- U5 ~0 x) w a. 6.9147 b. 6.9417 c. 6.9714