如图,在平面直角坐标系中,点
,点
,点
是第二象限内的一个动点,连接
、
、
,且
,则
的最大值是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7dc24c48d8b988443cc189488e8185d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316ba5cbb31299d683ac6c7dd795db85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1d387eb8254d5b4519d8298cd15b18f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712445047455744/2713681111842816/STEM/20a01cfd-c150-4c8f-89e1-da37b9e57b9f.png)
2021·江苏扬州·一模 查看更多[5]
2021年江苏省扬州市梅岭中学教育集团九年级中考第一次模拟考试试卷2021年江苏省扬州市梅岭中学中考第一次模拟数学试题2021年江苏省泰州靖江外国语学校5月数学一模试卷吉林省四平市2021-2022学年九年级下学期期中数学试题(已下线)黄金卷04-【赢在中考·黄金8卷】备战2023年中考数学全真模拟卷(江苏泰州专用)
更新时间:2021-05-04 10:21:16
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【知识点】 90度的圆周角所对的弦是直径
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适中
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【推荐1】(1)如图1,在
中,直径
垂直于弦
,垂足为
,若
,
,则圆的半径为________ .
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/0df936a3-bf92-4ec5-a314-2a0902795847.png?resizew=164)
(2)如图2,在
中,弦
垂直于弦
,垂足为
,连接
,
.若
,则圆的半径为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48813b8fc61cdb0c54fbc6a2e4bbd30b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca7e1a727ba332984ad857b3d25344d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/0df936a3-bf92-4ec5-a314-2a0902795847.png?resizew=164)
(2)如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/244f3835091e91f73428af59a7e54dae.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/822263c2-e09b-409a-8448-4e660640982b.png?resizew=168)
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【推荐2】如图,在四边形ABCD中,∠BAD=∠CDA=90°,AB=1,CD=2,过A,B,D三点的⊙O分别交BC,CD于点E,M,下列结论:
①DM=CM;②弧AB=弧EM;③⊙O的直径为2;④AE=AD.
其中正确的结论有______ (填序号).
①DM=CM;②弧AB=弧EM;③⊙O的直径为2;④AE=AD.
其中正确的结论有
![](https://img.xkw.com/dksih/QBM/2019/11/14/2333721677103104/2337469695123456/STEM/a9d81c9e37464ebaba4eb6b7a962be9f.png?resizew=159)
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