如图,为了测量河对岸的塔高AB,可以选与塔底B在同一水平面内的两个基点C与D,现测得CD=200米,且在点C和D测得塔顶A的仰角分别为45°,30°,又∠CBD=30°,则塔高AB=________ .
![](https://img.xkw.com/dksih/QBM/2021/8/20/2790363194802176/2792858914447360/STEM/9defe4cf56594a058c49f72b799a2e03.png?resizew=193)
18-19高一下·四川·阶段练习 查看更多[11]
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【推荐1】彬塔,又称开元寺塔、彬县塔,民间称“雷峰塔”,位于陕西省彬县城内西南紫薇山下.某同学为测量彬塔的高度
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【推荐2】某教师组织本班学生开展课外实地测量活动,如图是要测山高MN.现选择点A和另一座山顶点C作为测量观测点,从A测得点M的仰角
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