如图,平面直角坐标系中,
经过三点
,点D 是
上的一动点.当点 D 到弦
的距离最大时,点D 的坐标是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1d9218917d85a1dc19e60f076b8bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/232cf4716c23a4543edfdb3781a9ac1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1d9218917d85a1dc19e60f076b8bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2024-06-20 22:38:38
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【推荐1】如图,在平面直角坐标系中,点B,C在y轴上,△ABC是等边三角形,AB=4,AC与x轴的交点D为AC边的中点,则点D的坐标为( )
![](https://img.xkw.com/dksih/QBM/2019/1/25/2126545487994880/2132824743813121/STEM/ead6b85620204e8e8c72405eb99fdf42.png?resizew=97)
![](https://img.xkw.com/dksih/QBM/2019/1/25/2126545487994880/2132824743813121/STEM/ead6b85620204e8e8c72405eb99fdf42.png?resizew=97)
A.(1,0) | B.(2![]() | C.(2,0) | D.(![]() |
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【推荐2】在平面直角坐标系中,已知点
,
,点
在坐标轴上,若
是等腰三角形,则满足条件的点
的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a16a46f03535c5af872fa8fa9f21a431.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f20a748e7d78ccc3f7766fa58097ae0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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【推荐1】如图1,在
中,点
从点
出发向点
运动,在运动过程中,设
表示线段
的长,
表示线段
的长,
与
之间的关系如图2所示,下列结论不正确的是( ).
![](https://img.xkw.com/dksih/QBM/2021/5/27/2730112608657408/2732159061671936/STEM/8d8b39f7-0ad9-42fb-bd23-f024d2feaf63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c92c257e6ecf8fda62329560a7af78d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/2021/5/27/2730112608657408/2732159061671936/STEM/8d8b39f7-0ad9-42fb-bd23-f024d2feaf63.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,
中,
,
,点P和点Q分别从点B和点C同时出发,沿射线
向左运动,且速度相同,过点P作
,垂足为H,连接
,设点P运动的距离为
,
的面积为S,则能反映S与x之间的函数关系的图像大致为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/16/0606a9a3-a7f1-4d68-957b-8512fec1216f.png?resizew=175)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b935580f6c20b82112df78d570a482b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/141ee0cedfea5ae83aaac1106e2cc259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5bdbbd3084ddc946e12d530d2192522.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3797b05b98a44c76791966f5ef63b075.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44b2371192ac906247fc3481fee44dfe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/16/0606a9a3-a7f1-4d68-957b-8512fec1216f.png?resizew=175)
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【推荐1】如图,⊙O是△ABC的外接圆,弦AC的长为3,sinB=
,则⊙O的半径为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
A.4 | B.3 | C.2 | D.![]() |
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【推荐2】已知⊙O的半径为4,圆心O到弦AB的距离为2,则弦AB所对的圆周角的度数是( )
A.30° | B.60° |
C.30°或150° | D.60°或120° |
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【推荐1】如图,在矩形
中,
,
,点E、F分别是边
上的动点,且
,点G是
的中点,连结
,则四边形
面积的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bd3724385f98a2415ba27f8df4c31d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b08668b77628265eaa98a3cee1338dad.png)
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A.142 | B.96 | C.192 | D.124 |
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【推荐2】如图,矩形
中,
,
,点
是矩形
内一动点,且
,连接
,
,则
面积的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc9b0d3cf342e065b4c8e21443bfbfbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80672dda9430cb42b3136bcb1b67bbad.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/d6b5e063-43e3-4c6e-8c9f-2e99af7e7c79.png?resizew=149)
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