6 x" D. W7 H4 l' Y9 ]9 \* P; M求: 7 B/ X- d; {" U E0 ? y1. AB长度为何? 0 T7 Z% n$ O6 x a. 107.6909 b. 107.9690 c. 107.9960. }" t8 \' ^& C# t( c, j' M
2. BC长度为何? * G! W* p$ ?+ Y, ~3 D) q a. 74.6890 b. 74.8960 c. 74.9860 + J6 i D6 [0 J% y& U4 T! q3. ∠ABC角度为何?8 t- Y) ~2 {; v" E! s. K0 G
a. 48.0352° b. 48.3502° c. 48.5302° % M' O# U6 i6 P8 e5 G: G" a/ E$ i4. 蓝色剖面线区之周长为何?5 F( U! V9 a& m5 @' O
a. 169.6099 b. 169.6909 c. 169.6990 ! m& l; L7 ?2 f0 E' T5. 绿色剖面线区之面积为何? 5 I1 b! e4 W8 I0 s) A a. 306.2937 b. 306.3729 c. 306.3792