如图①,在平面直角坐标系中,
,
,连接
,
,且
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/1/bbf1755d-4c27-4533-8db3-d2620c776eb9.png?resizew=281)
(1)求点
的坐标;
(2)如图②,若点
从点
出发沿
轴向左移动,连接
,作等腰直角
,连接
.当点
在线段
上时,求证:
;
(3)在(2)的条件下,若
三点共线,求此时
的度数及点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08a4f60b270ad2d549d8b0286088e9df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df4fb37bb65a8e0fbad3a0e5a37b5715.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8af620f6d204d310d8e3f267fdd6c3f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/1/bbf1755d-4c27-4533-8db3-d2620c776eb9.png?resizew=281)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)如图②,若点
![](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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8dcc9f79fe5f07f25447aa442ee14ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a51dfab0c1ec275ff83d08c7293968c4.png)
(3)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eeec6e343898345719ab4b66a82c8ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
更新时间:2024-03-01 23:44:30
|
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【推荐1】已知:三点A(-2,-1)、B(4,-1)、C(2,3).在坐标平面内画出以这三个点为顶点的平行四边形,并写出第四个顶点的坐标.
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【推荐2】如图所示,在平面直角坐标系
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(3)在点D的运动过程中,请写出
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f43dd27150098f6dfabfdac92da27e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8407954a328c08add8decf551fa4340d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246a86f34603eaf2e6a948681b831b0d.png)
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【推荐1】探究:如图,分别以△ABC的两边AB和AC为边向外作正方形ANMB和正方形ACDE,NC、BE交于点P.
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解答题-问答题
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【推荐2】问题背景:(1)如图1,
,
,
,图中存在一个三角形绕某点旋转得到另一个三角形,直接写出旋转中心和旋转角;
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,
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解答题-证明题
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名校
【推荐1】如图,长方形
,把长方形沿对角线
折叠,使点C落在点E处,
交
于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/5e5f9c94-719a-40cf-9ee9-c049ed3f3d41.png?resizew=184)
(1)请证明点F在线段
的垂直平分线上;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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(1)求作一个等腰△ABC,使底边长BC=a,底边上的高为b.(尺规作图,只保留作图痕迹)
(2)小明由此想到一个命题:等腰三角形底边的中点到两腰的距离相等,请你判断这个命题的真假,如果是真命题请证明;如果是假命题请举出反例.
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