【进阶级练习题69】 * j- f: h8 X* j( i- F" u / C s# u& ^/ q5 o( E7 e5 A求:+ k3 Y0 U( n! U( U
1. a 之半径值为何?' i; r) v9 N; O/ n( v$ N7 h, N4 y
a. 79.5577 b. 79.5757 c. 79.5775 & G) X# k) ?7 S" v9 Q2. b 之半径值为何? $ d# l" D. i0 S: m! o* t a. 47.7465 b. 47.7564 c. 47.76546 s0 z2 x( D% |6 H, G5 y9 @ i
3. c 之半径值为何? " v1 C1 X: m$ S) ^ a. 31.8013 b. 31.8130 c. 31.83108 n& t- z i; z" M! @, z* b
4. d 之半径值为何? m; s8 H% m7 N; t0 v a. 63.6026 b. 63.6260 c. 63.6620( l- J O4 _! T* F& q) j2 P
5. 此图围成之面积为何?" u* D- q- j# `6 s: c- x& _
a. 10026.7164 b. 10026.7641 c. 10026.7614