【进阶级练习题29】 1 K4 J8 ?* i3 b6 O8 M原创:Joseflin先生(台湾) 整理:SHAONX(上海) O, z y3 |& o, w/ O- R
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求: . l) P* y/ |. ]1. a之长度值为何?5 X5 Y3 F# W P" q8 G
a. 173.2051 b. 173.2150 c. 173.2501' L; d- [" W( w; F
2.AD之距离为何?& K# K Y |. F: G
a. 312.2499 b. 312.2949 c. 312.2994# Y3 l* T. q0 N/ d
3. ∠ABC角度值为何? 6 a9 T+ E- h# d+ P1 T a. 51.778° b. 51.787° c. 51.877° u; s1 f7 o8 `) Z- g: z4. 蓝色区域之面积为何?# \3 ^1 L7 X$ R5 \1 G
a. 64951.3509 b. 64951.5309 c. 64951.9053