【进阶级练习题70】3 t. i- M5 k, Y3 I, h$ T2 m, @
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求:! T1 J1 @8 M2 Z- N0 g. n2 Z
1. ∠b弧之角度值为何?8 O9 x" K5 R- r6 y! U% _, N5 @0 g, b1 j
a.68.557° b. 68.575° c.68.755° 9 J2 ~3 c: R1 P# [2. c 弧之长度为何? ( F' T: J$ I I( s: o. H a. 68.4057 b. 68.4750 c. 68.4507* Z) r! m) M% _: l! h
3. d 之半径值为何? : L' }8 r6 d& X; w! G% M a. 14.1085 b. 14.1508 c. 14.1850 ' O! h* M! N& c D) w4. e 弧之长度为何?4 y3 Z2 Q6 Z0 q9 R2 [
a.99.4029 b.99.4209 c.99.2409% M8 e2 [- O, P' h0 x* A
5. f 之长度为何? % U. j! R% r$ [+ K# A a. 41.2925 b. 41.2295 c. 41.2529+ y" x. u7 m+ \5 s; i3 g