+ Z$ v" D7 h6 k1 E# T; j; q" b求: ! `: x0 A+ h) v3 [9 ^1. a 之半径值为何?8 w9 U) k; {2 }4 j
a. 79.5577 b. 79.5757 c. 79.5775" X/ e% [+ P* E# s; A! P, x5 g
2. b 之半径值为何? ' O! z0 o& ^$ W* ~) u7 t a. 47.7465 b. 47.7564 c. 47.76549 d! q% z/ |) p* q; V
3. c 之半径值为何? 3 V4 S$ a/ l4 H' e4 G- t a. 31.8013 b. 31.8130 c. 31.8310 1 n: _7 \. N2 `: ~6 f- }; [+ [# u4. d 之半径值为何?1 e! Q( L! }$ D8 l' k- R V
a. 63.6026 b. 63.6260 c. 63.6620 5 z* x+ \0 |4 L, g7 R5. 此图围成之面积为何?6 ?+ F8 C' j, L
a. 10026.7164 b. 10026.7641 c. 10026.7614
1. c. 79.5775/ h: `5 j# A) w9 H
2. a. 47.7465 4 Z* W* e7 r2 ?1 w9 e* L' G1 V$ A3. c. 31.8310 " d( D% W# S# R; |( b5 S2 B L4. c. 63.6620) D8 N6 x/ O" e& A
5. c. 10026.7614