名校
解题方法
1 . 在矩形
中,
,
,
,
是平面
内的动点,且
,若
,则
的最小值为____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d582d3e7ec013a1b409810ed38633d7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a8c4f87043cd193f95d6ebcc1fc5f5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d61f98f7418eda31a1d7c457e3841c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/990b2fb4961eebd49a6eb62e2beef238.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/26/a0c2d1bc-b38f-4cd6-8830-5e9fc86a037f.png?resizew=186)
您最近一年使用:0次
2022-06-25更新
|
1575次组卷
|
5卷引用:浙江省丽水市2021-2022学年高一下学期普通高中教学质量监控(期末)数学试题
浙江省丽水市2021-2022学年高一下学期普通高中教学质量监控(期末)数学试题青海省西宁市城西区青海湟川中学2022-2023学年高三上学期12月月考文科数学B试题(已下线)专题8-1 直线与圆归类(讲+练)-3(已下线)重难点01平面向量的实际应用与新定义(2)(已下线)上海市华东师范大学第二附属中学2023-2024学年高二上学期10月月考数学试题
2 . 如图,在
中,
,
,
,点D在线段
上运动,沿
将
折到
,使二面角
的度数为
,若点
在平面
内的射影为O,则
的最小值为_______ .
![](https://img.xkw.com/dksih/QBM/2021/2/14/2657961818071040/2658478787305472/STEM/81f4b1cc-cc22-45ce-a3f6-bf579d70e3f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e393389fcb8c45db6df53c77f4589f71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/883fc5e3faf39829d60804b59deb1730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0420f4b639b59af90f79fa2de343614.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f517953a21c2a45fd8465072c44bfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da8421abfc5674efc0d15bc8a5007474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3448091fc3cb31c12c92b2bdc3e6c1e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://img.xkw.com/dksih/QBM/2021/2/14/2657961818071040/2658478787305472/STEM/81f4b1cc-cc22-45ce-a3f6-bf579d70e3f5.png)
![](https://img.xkw.com/dksih/QBM/2021/2/14/2657961818071040/2658478787305472/STEM/de1ab3c5-998f-4492-bcdc-c318be4be4d3.png)
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解题方法
3 . 如图,在
中,
,
,
,过
中点
的动直线
与线段
交于点
,将
沿直线
向上翻折至
,使点
在平面
内的射影
落在线段
上,则直线
运动时,点
的轨迹长度是_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8bc235df1d3cf1b65050cd1907590cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ea0df817e3e2cd95b9cd8f73386834c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5a9fc2dda89829fa2c610a8fce86d22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6133606e8415f52b2abdf33804ee7860.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dae7f709cd4bf123f329605b2f9ea679.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://img.xkw.com/dksih/QBM/2021/2/2/2649586349883392/2650821989883904/STEM/cae8e7dc-9d1f-4219-b2c7-6ea7f471b6d6.png)
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