如图,在平面直角坐标系中,
,以
为圆心
为半径作
交
轴于
为
上一动点,连接
,取
中点
,连接
,则
的最大值为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6358b33a2e4cd80b90b750ae6f1a303a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b91d650c2fc1a741fabdb333b09aeb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1d9218917d85a1dc19e60f076b8bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96eb3db2257e2502635ce7248631ac82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1d9218917d85a1dc19e60f076b8bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fb7c9b5376c6d491e743b710bc25701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be8b952ce2d2088779a178422742301b.png)
![](https://img.xkw.com/dksih/QBM/2023/1/6/3147049316818944/3148361349554176/STEM/326567d2e9054a3e8636b98891633928.png?resizew=194)
更新时间:2023-01-08 13:40:28
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【推荐1】如图,在四边形
中,
,对角线
与
互相垂直,
.过点A作
于
交
于点F,若F为
的中点,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ca90e8a784f990c4097eec9219908d.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c284ccb6f4ee7a8690013d2ce16e226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21c25f881135de4f9edfc064e710dede.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e3f5dc11efe60b4fd9a13b1d6b83842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/376048ea6a06d3069c70930391d61554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f927c0e469bae17b902f3b4df617610c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ca90e8a784f990c4097eec9219908d.png)
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【推荐2】如图,正方形
的对角线交于点O,以
为边向外作
,
,连接
,
,
,则另一直角边
的长为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e7ba6e267dde1a65a98f9f36b585ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d10b6175fb056760a9357936d14ffe82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea147ada4f0aefdd3808a6a1133792eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4ef5a73d9756ec88728b75e04b776e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/11/09eec283-e9ab-43cd-9066-02d5b93a4d5b.png?resizew=114)
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【推荐1】如图,若菱形ABCD的边长为2cm,∠A=120°,将菱形ABCD折叠,使点A恰好落在菱形对角线的交点O处,折痕为EF,则EF=_____ cm,
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/26/1c7bf782-bfbe-4386-b7fb-3f62aa7a366f.png?resizew=202)
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【推荐2】如图,正方形ABCD的边长为6,点P为BC边上一动点,以P为直角顶点,AP为直角边作等腰Rt△APE,M为边AE的中点,当点P从点B运动到点C,则点M运动的路径长为______ .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/63e55474-57cf-4769-b74f-deec22fdb07b.png?resizew=152)
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【推荐1】在平面直角坐标系xOy 中,点A 的坐标为(1,0),P 是第一象限内任意一点,连接PO,PA,若∠POA=m°,∠PAO=n°,则我们把(m°,n°)叫做点P 的“双角坐标”.例如,点(1,1)的“双角坐标”为(45°,90°).若点P到x轴的距离为
,则m+n 的最小值为___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
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【推荐2】问题背景:如图1,在
中,
分别是
两边的中点,如果
上的所有点都在
的内部或边上,则称
为
的中内弧,例如,下图中
是
的一条中内弧.
![](https://img.xkw.com/dksih/QBM/2020/10/5/2564268440838144/2566070768951296/STEM/4adf034f-2d44-4d21-b95d-9dc12d982f5f.png?resizew=263)
问题拓展:如图2:在
中,AB=AC,D、E分别是
的中点.当
与
的边
相切时,最长的中内弧
.
问题解决:在平面直角坐标系中,已知点
,在
中,
分别是
的中点.若在
中存在一条中内弧
,使得
所在圆的圆心
在
的内部或边上.直接写出
的取值范围____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c44512cb86bcf48c6d21357f45b533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c44512cb86bcf48c6d21357f45b533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c44512cb86bcf48c6d21357f45b533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/2020/10/5/2564268440838144/2566070768951296/STEM/4adf034f-2d44-4d21-b95d-9dc12d982f5f.png?resizew=263)
问题拓展:如图2:在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c44512cb86bcf48c6d21357f45b533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c44512cb86bcf48c6d21357f45b533.png)
问题解决:在平面直角坐标系中,已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37b5bc9cb1a933b63363a5f21508700.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c44512cb86bcf48c6d21357f45b533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c44512cb86bcf48c6d21357f45b533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/2020/10/5/2564268440838144/2566070768951296/STEM/bb45323e-08f6-4fe2-8b8f-64922bea9b6d.png?resizew=276)
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