如图,某数学活动小组要测量建筑物
的高度,他们借助测角仪和皮尺进行了实地测量,测量结果如下表:
请根据表格中测量数据,计算出建筑物
的高度.
(结果精确到
.参考数据:
,
,
,
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
测量项目 | 测量数据 |
测角仪到地面的距离 | ![]() |
从![]() ![]() | ![]() |
从![]() ![]() | ![]() |
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/30/a7e04d62-6cfb-40f7-9269-4ac93a76dc57.png?resizew=143)
请根据表格中测量数据,计算出建筑物
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(结果精确到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfaa19eeaf415ed419e77fe92794f443.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d69b57ac28710f1d8c476d6397bf2ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81c72acfa57b049df39e815e424a2763.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aec9fc9ccda1041af9901a4bcf6df4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28ea3c7e6efd548ecc3baed26c8b6c78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134b920d0b80633788ae8fae2029d60c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03fe962af64f2c60c4a902b0e636f637.png)
2023·辽宁铁岭·一模 查看更多[2]
更新时间:2023-05-28 16:03:11
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解答题-作图题
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【推荐1】如图,在
中,
,
,点
是
边上一个动点(不与
,
重合),连接
,将线段
绕点
逆时针旋转
,得到线段
,连接
.
(1)求
的度数;
(2)过点
作
,交
于点
,交
的延长线于点
,连接
,交
于点
;
①依据题意,补全图形;
②用等式表示线段
,
的数量关系,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/15/156d416b-45b4-48ab-840c-2ab9f461efed.png?resizew=347)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a2db6311e228ed33b6c71d0a5918cf.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee662ef4fc90d0bbee6f1966722999d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
①依据题意,补全图形;
②用等式表示线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
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解答题-证明题
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【推荐2】如图,在![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c334a99fd971716a2802710f01d43ae.png)
中,
,
与
相切于点
,
为
上一点,经过点
,
的
分别交
,
于点
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/11/bdaf669c-b0be-4533-912d-757ddd07e236.png?resizew=143)
(1)求证:
平分
;
(2)若
,
,求
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(1)求证:
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(2)若
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解答题-应用题
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【推荐1】如图,小李在斜坡
上发现了一棵白桦树
,他想根据所学知识计算该树的高度,于是测得树底部
到坡脚
的距离
为15米,斜坡
的坡比为
,在距离坡脚7米远的点
处测得白桦树顶点
的仰角为
,已知点
,
,
,
在同一平面内,且
,求白桦树
的高度.(结果保留根号)
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解答题-计算题
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【推荐2】春节期间,小明和小华同学来到某大型游乐场,他们发现有一个圆形摩天轮,如图中
所示,他们想通过自己所学的数学知识测量摩天轮最高点距离地面的高度.他们设计的测量方案如下:首先测量出摩天轮底部离地面的高度
为
米,其次在摩天轮所在平面内的地面上选两个测量点
,在
处测得摩天轮中心点
的仰角为
,在
处,测得摩天轮中心点
的仰角为
:最后测得两个测量点
间的距离为
米以上各点均在同一平面内,
三点共线.
请根据以上数据,帮助他们计算出摩天轮的最高
到地面的高度是多少米?(结果保留根号)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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请根据以上数据,帮助他们计算出摩天轮的最高
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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