( f6 {) Q3 Y1 f求: / c' K5 }$ i2 \1. BC 距离为何? 7 M# J7 b7 o" M- V. K a. 64.9497 b. 64.9749 c. 64.99478 g, j% y `* M o- A
2. ∠BAC 之角度值为何?) J; z5 ~' b$ h- K# M
a. 46.457° b. 46.574° c. 46.745° 9 G% ` p8 F9 C2 b3. 此外围面积为何?: y7 q. z# t% G& c) q) K
a. 5007.4855 b. 5007.5484 c. 5007.5584 ! v6 D, Q6 H& K附图: