如图,将
绕点C顺时针旋转,使点B落在
边上的点D处,点A落在点E处,
与
相交于点F,若
,
,
,则
的长为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76644ca2e1256967f218b1f40c358ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
2024·广东珠海·一模 查看更多[3]
更新时间:2024-04-16 17:59:02
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【推荐1】如图,已知AC平分∠BAD,CE⊥AD于点E,BC=CD.有下列结论:①∠ABC+∠ADC=180°;②AB+AD=2AE;③∠CBD=∠CAB;④AD﹣AB=2DE.其中正确结论的序号是 _______ .
![](https://img.xkw.com/dksih/QBM/2021/12/1/2862911525904384/2863088230195200/STEM/b5831089-0c98-4348-b84a-58ee2a70d7df.png?resizew=159)
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【推荐2】如图,在
中,
,
,
,
平分
,交
边于点D,点E在
边上.若
是直角三角形,则
的长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad4c0ba3a6750537789844d0ec419d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b939af5ba06e279cce39396aaf0fae06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
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【推荐1】如图,正方形ABCD的边长为2,点E为边BC的中点,点P在对角线BD上移动,则PE+PC的最小值是_______ .
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【推荐2】延长正方形ABCD的BC边至点E,使CE=AC,连接AE,交CD于F,那么∠AFC的度数为______ ,若BC=4cm,则△ACE的面积等于______ .
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【推荐1】如图,在平面直角坐标系中,点
在
轴上,
是直角三角形,
,点
的坐标为
,将
绕原点
顺时针旋转
得到
,则过
,
两点的直线解析式为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50fdfa5407cfa15978f3557cacdf27c8.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f00ac42342a18f47cb58bc8d9cf39c5e.png)
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【推荐2】如图,在
中,
,
,把
绕点C逆时针旋转
度得到
.
![](https://img.xkw.com/dksih/QBM/2021/12/28/2884306911543296/2948091967275008/STEM/87d7c9b0-b5cd-44d5-a3df-4e2faf9de3a8.png?resizew=266)
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26a4a4638087ad08128eba70daef8af7.png)
________ (用含
的式子表示);
(2)若
,
,则线段
在旋转过程中扫过的图形的面积是______ (结果保留π).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6dd00e28ef025371eadd52e4e15a6eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
![](https://img.xkw.com/dksih/QBM/2021/12/28/2884306911543296/2948091967275008/STEM/87d7c9b0-b5cd-44d5-a3df-4e2faf9de3a8.png?resizew=266)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26a4a4638087ad08128eba70daef8af7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
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