【进阶级练习题87】+ W$ r$ X2 D; V* q5 o" H% |" ~
1 W; [, N( F' }$ d. `+ e: }
求:; R* P) G1 B8 q
1. A之距离为何? 3 d1 N, Z0 @! M [# n7 P$ { a. 25.7812 b. 25.8712 c. 25.87210 \! ?7 r8 |; j* m1 ~
2. B之半径值为何? % K4 y6 r2 I. o6 o9 [# k" u a. 12.9409 b. 12.9904 c. 12.9940 : h7 x4 s- ~7 w+ ^# k% Z) J3. CD之距离为何?- p& N: E7 V$ c% [ l
a. 21.2132 b. 21.2231 c. 21.2321# \' C' V. A; X
4. ∠CDE角度值为何?( K* D/ {" j% v5 G% X4 y
a. 24.376° b. 24.637° c. 24.736° ; |9 m G8 U/ }5 c9 Q' w5. 蓝色剖面线区之面积为何? 4 Y8 r" o4 K( R1 U a. 83.5686 b. 83.6568 c. 83.8566