如今,不少人在购买家具时追求简约大气的风格,图1所示的是一款非常畅销的简约落地收纳镜,其支架的形状固定不变,镜面可随意调节,图2所示的是其侧面示意图,其中
为镜面,
为放置物品的收纳架,
为等长的支架,
为水平地面,已知
,
.(结果精确到
.参考数据:
)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/29/92e15f0c-ffe4-4b41-998b-d7eec6b1c570.png?resizew=104)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/29/6e750666-4aa4-442b-9e43-c478a7ef4e11.png?resizew=133)
(1)求支架顶点
到地面
的距离.
(2)如图3,将镜面顺时针旋转
求此时收纳镜顶部端点
到地面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29b197f456b5f0b0bf3b985b2cdcc317.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bcc960364ba71da42fcab71795ab5e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96a4fe52baabb3071d55134f157a6079.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/786d8d7cc130d3796a4e0397d8c57e37.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/29/92e15f0c-ffe4-4b41-998b-d7eec6b1c570.png?resizew=104)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/29/6e750666-4aa4-442b-9e43-c478a7ef4e11.png?resizew=133)
(1)求支架顶点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)如图3,将镜面顺时针旋转
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e538c45f550309212e7ac40caec42a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/29/130fadbb-0b15-448f-bd8c-add48ffc4042.png?resizew=136)
2020·江西南昌·二模 查看更多[6]
江西省南昌市2019-2020学年九年级第二次调研考试数学试题2020年江西省南昌市中考数学二模试题(已下线)【南昌新东方】 00-2020初三春季5月新建区调研考(二模) 10(已下线)期末模拟检测(2)-2020-2021学年九年级数学上册十分钟同步课堂专练(沪科版)2021年江西省赣州市石城县中考数学第一次联考试卷 2021年湖北省宜昌市五峰县中考数学模拟试题
更新时间:2020-05-24 11:47:08
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【知识点】 其他问题(解直角三角形的应用)
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【推荐2】如图,在坡角
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的斜坡上有一棵垂直于水平地面的大树
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的高.(结果精确到
米,
,
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【推荐3】2023年的政府工作报告中传递出文旅发展新动态,陕西某市政府积极响应,对辖区内的景点设施和交通等硬件进行改造和升级,提升消费者的满意程度.如图,该区有A,B,C,D四个景点,景点A,D,C依次在东西方向的一条直线上,景点B在景点D的正北方向,且景点C与景点D的距离为
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,
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(1)求公路
的长度;
(2)市政府准备在景点C,B之间修一条互通大道(即线段
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,
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f971d44effe601c7244f7bcde43b863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dcfcb3705b261cdaa2291515d921fa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6bdca729222cd8fe0aea6fd602a86fc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/15/8fe1a930-de34-4ff0-80e3-8f33b75cd18c.png?resizew=212)
(1)求公路
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)市政府准备在景点C,B之间修一条互通大道(即线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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