【进阶级练习题48】! D$ G$ X1 [+ p b 原创:Joseflin先生(台湾) 整理:SHAONX(上海)( E& ?% Q1 r& r0 A
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求: ( q( d4 a- s& k+ [& i1 N1.AB之垂直距离为何?( [0 k: Q. a2 y- @! G! v4 O
a.19.5606 b. 19.6506 c. 19.6605 7 }9 `+ T, n* ^$ r0 a2.∠ABC之角度为何?& w: M( T$ x# G7 h1 p V
a. 51.589° b. 51.895° c. 51.985°, r! s" z4 {# A2 k0 M: C
3. 红色剖面线区之面积为何?( w3 m- D, x# m; y% a
a. 108.5891 b. 108.8519 c. 108.9815 ! g( A* z' }$ F. A" \4. 绿色剖面线区之周长为何? $ m! Y$ R5 t2 i+ W a. 100.4837 b. 100.8473 c. 100.7384