6 D; Z! I/ ~# ~/ N5 Z+ O求: 1 B# m! T I! i1. AB长度为何? - W. `" m" x9 E a. 107.6909 b. 107.9690 c. 107.9960 1 {1 t( X( r+ v2. BC长度为何? 7 }1 y2 i: X3 s$ @ a. 74.6890 b. 74.8960 c. 74.9860* c0 ~' S& e( M' n5 G2 }5 P
3. ∠ABC角度为何?; I( k3 Y4 U3 V. U' W6 L
a. 48.0352° b. 48.3502° c. 48.5302° 1 v% m2 a0 \3 U n4. 蓝色剖面线区之周长为何? , O/ ^) y+ s, O2 I5 l a. 169.6099 b. 169.6909 c. 169.6990 5 o8 [' r4 \) {% {; V9 A5. 绿色剖面线区之面积为何? / ?* ^0 K# S- v# y& }3 V a. 306.2937 b. 306.3729 c. 306.3792