【进阶级练习题96】# D) I$ {6 N8 G& C) k" F0 z) t7 h7 O
9 s! h5 V6 M" l4 L* \
求:1 A8 c: R3 S6 }9 u
1. BC 之长度为何? g0 v3 }( o9 _/ @3 h p
a. 62.8677 b. 62.8767 c. 62.8776 , ]' d; _0 U8 F+ a; M2. a 弧之长度为何? }+ U, ~: ?, z0 w7 C/ E+ D* B0 u a. 106.7237 b. 106.7327 c. 106.7723% p0 R# T6 D% W8 e9 p3 I( v$ T
3. ∠ADE 之角度值为何?$ ` G7 }% s1 n( ?+ l& h+ k
a. 54.487° b. 54.748° c. 54.874°$ X5 ~* Z7 ?$ v
4. f 之半径值为何?$ r7 z0 ~- g8 u
a. 9.9064 b. 9.9406 c. 9.96044 i/ i% o1 H/ i
5. g 之半径值为何? + ~$ R( a- F* U! | a. 6.9147 b. 6.9417 c. 6.9714