求:
( B6 x- W4 f/ z/ H6 s1. a之长度为何?
) F: ^$ N- y4 t5 J; R' I' c' ? a. 29.4015 b. 29.4105 c. 29.4510
& ]( Y/ @- O4 |' x2 X2. b之长度为何?4 L7 A: C* \! @$ q- A6 f" w, g- |- U
a. 24.4779 b. 24.7479 c. 24.77499 H# L& ^8 M. ?( n/ x( M+ W
3. c之长度为何?3 C- @( `7 l: m8 ~3 W6 t+ t4 w
a. 36.3781 b. 36.7381 c. 36.8137
( `& P2 N7 @( D. ~4. 红色五边形区域之周长为何?
! ?$ X) {9 u1 |* {# e3 ~ a.79.1178 b. 79.1718 c. 79.1871# A2 j, m4 k6 }' m& J: c% c
5. 蓝色剖面线区域之面积为何?
; P2 D( l! T# e7 U+ _. }/ F( d) i a. 313.1542 b. 313.4152 c. 313.5142 cacab |