求:5 c0 e& e% U5 H3 N( r
1. A,B之距离为何?/ c3 k0 n" w. {+ r# Y, N0 |
a. 81.4245 b. 81.4425 c.81.45426 m6 ~2 i' C( @) a" Q
2.,C之弧长为何?4 h _% Q4 s" o: D9 j ^" G' ]( l; V
a.62.135 b. 62.315 c. 62.513+ {/ e( m5 q) o3 ^
3., D之弧长为何?
5 l4 A4 _8 M( K a. 40.2020 b. 40.2002 c. 40.0202* Q$ |6 G% i/ J7 j+ T
4. <BAE 之角度值为何?8 D A' j2 s% F8 e9 t
a. 55.183° b. 55.813° c.55.318°
! \( y1 m1 v. N; W5.外围之面积为何?& [9 ~3 E4 T Z1 t8 K# h7 k7 ]0 J- Q
a. 2417.8099 b. 2417.8909 c. 417.9809) Z# f% V! w& B0 H
说明一下,画C弧时,辅助圆与43度斜线有2个交点,用上面一个 \: ^2 J9 U$ R( b' j
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