* ]0 v2 C S+ x9 }8 P, _$ `- W求: 4 ?6 t( J: P' x [: P- _1. AB长度为何? . x/ ~5 @! A7 K" Y a. 107.6909 b. 107.9690 c. 107.9960% k+ Q0 L' O3 t* r, o
2. BC长度为何? ! r2 {; c3 b% t2 m% X* s5 d a. 74.6890 b. 74.8960 c. 74.9860 ; G7 R5 `/ m: v3. ∠ABC角度为何? ; s" L; X4 j# K7 v9 K! _ a. 48.0352° b. 48.3502° c. 48.5302° 8 g& S \# Q, i+ R4. 蓝色剖面线区之周长为何?% t# y( R: s4 E2 y# O+ g( e* ~6 Q# O
a. 169.6099 b. 169.6909 c. 169.6990" }4 ?6 p0 }0 M$ l+ L; x
5. 绿色剖面线区之面积为何?" s3 b. r4 `4 g0 q
a. 306.2937 b. 306.3729 c. 306.3792