如图,△ABC是学生小金家附近的一块三角形绿化区的示意图,为增强体质,他每天早晨都沿着绿化区周边小路AB、BC、CA跑步(小路的宽度不计).观测得点B在点A的南偏东30°方向上,点C在点A的南偏东60°的方向上,点B在点C的北偏西75°方向上,AC间距离为400米.问小金沿三角形绿化区的周边小路跑一圈共跑了多少米?
(参考数据:
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193436772487302/SYS201311011934367724873021_ST/0.png)
≈1.414,
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193436772487302/SYS201311011934367724873021_ST/1.png)
≈1.732)
考点分析:
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