如图,点B,F,C,E在一条直线上,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/6/949aa4ef-d46b-450c-8a96-d60ac4cb270f.png?resizew=136)
(1)求证:
;
(2)若
,
,求
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a510a3eb906b3ef0760b0d1723d11ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd81adb13f5a7550b0f94f770900a613.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5adaae99b4ac308549134169e69247a6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/6/949aa4ef-d46b-450c-8a96-d60ac4cb270f.png?resizew=136)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7da8fe8f5f8a3f17561d70652ad1172a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3032820a0d2d50d9143e7923f5936ddf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6402c0f9eecfcdf73f9e87ca82a6f2c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/862730f28c12750ebea0af5edcac5fef.png)
更新时间:2024-01-06 10:29:45
|
相似题推荐
解答题-作图题
|
适中
(0.65)
【推荐1】已知点
,
,
是不在同一条直线上的三个点,过
,
两点作直线,作线段
并延长至点
,使得
.作射线
,在射线
截取
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/d029c499-f32d-4627-bc8c-b7b344d8da0e.png?resizew=123)
(1)用尺规作出图形,并标出相应的字母;(保留作图痕迹,不写作法)
(2)若
,
,求
长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ed126eea43f2dd2184e533280a6b357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dbbb0fef80bccfff7eebca6d2803b4c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/d029c499-f32d-4627-bc8c-b7b344d8da0e.png?resizew=123)
(1)用尺规作出图形,并标出相应的字母;(保留作图痕迹,不写作法)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】如图,线段
,点C在线段
上,点N在线段
上,且
,M是线段
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/11/bddab348-cab2-4508-a636-3fcaddb7d401.png?resizew=226)
(1)求线段
的长度;
(2)若
,求线段
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/603731dfd3803024ccbb69131a47de7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17095f7e80c29a2723c163405b66b27f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/11/bddab348-cab2-4508-a636-3fcaddb7d401.png?resizew=226)
(1)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/746b729203008791bdd3905f3da4b756.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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解答题-证明题
|
适中
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名校
【推荐1】如图所示,
且
,
,
交于点
,点
,
分别是
,
上的点,且
,连接
,
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c35c43d90814396ff06336fa45e9650.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ff56ea00ca90825f3d95809de24f639.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c55ee522f41c43253050e92b3c8de31.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/11/9070daaa-39d2-40bd-b08c-d56a87166034.jpg?resizew=171)
您最近一年使用:0次
解答题-问答题
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适中
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【推荐2】如图,点
,
,
,
在直线
上,点
,
在直线
的异侧,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/6/3d2d85bd-3b8f-4e4c-903f-93cb95e39e71.png?resizew=203)
(1)求证:
;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd81adb13f5a7550b0f94f770900a613.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fec9e3bf7ff287df2cbdff8addfaf5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a510a3eb906b3ef0760b0d1723d11ae.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/6/3d2d85bd-3b8f-4e4c-903f-93cb95e39e71.png?resizew=203)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ca10806fc8c3c3efd6859f526b76900.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb01d2b57580731c8b807ac8cffc8ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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解答题-问答题
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适中
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【推荐1】定义:将图形M绕点P顺时针旋转90°得到图形N,则图形N称为图形M关于点P的“垂直图形”.例如:在下图中,点D为点C关于点P的“垂直图形”.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/f82b0821-fc1c-4c23-9034-60cc9f896dfa.png?resizew=180)
(1)点A关于原点O的“垂直图形”为点B.
①若点A的坐标为(0,2),直接写出点B的坐标;
②若点B的坐标为(2,1),直接写出点A的坐标;
(2)E(-3,3),F(-2,3),G(a,0).线段EF关于点G的“垂直图形”记为E′F′,点E的对应点为E′,点F的对应点为F′.
①求点E′的坐标;
②当点G运动时,求
的最小值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/f82b0821-fc1c-4c23-9034-60cc9f896dfa.png?resizew=180)
(1)点A关于原点O的“垂直图形”为点B.
①若点A的坐标为(0,2),直接写出点B的坐标;
②若点B的坐标为(2,1),直接写出点A的坐标;
(2)E(-3,3),F(-2,3),G(a,0).线段EF关于点G的“垂直图形”记为E′F′,点E的对应点为E′,点F的对应点为F′.
①求点E′的坐标;
②当点G运动时,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c91725cdcd86f28060277a45dd5285.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/468eb79b-8811-43b5-9cc8-6f01f053892d.png?resizew=416)
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解答题-证明题
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【推荐2】阅读理解,自主探究:
“一线三垂直”模型是“一线三等角”模型的特殊情况,即三个等角角度为
,于是有三组边相互垂直.所以称为“一线三垂直模型”.当模型中有一组对应边长相等时,则模型中必定存在全等三角形.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/8/388962d5-e0d8-40ae-9a22-748d4175408b.png?resizew=351)
(1)问题解决:如图1,在等腰直角
中,
,
,过点C作直线
,
于D,
于E,求证:
;
(2)问题探究:如图2,在等腰直角
中,
,
,过点C作直线
,
于D,
于E,
,求
的长;
(3)拓展延伸:在平面直角坐标系中,
,
为等腰直角三角形,
,
,求B点坐标.
“一线三垂直”模型是“一线三等角”模型的特殊情况,即三个等角角度为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/8/388962d5-e0d8-40ae-9a22-748d4175408b.png?resizew=351)
(1)问题解决:如图1,在等腰直角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/777b2fbc01cfc26cde436f625a5b7cb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/526108bb5ea7ed33052b0eb47072bc34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c1c122603b60b6f1a1334ddb56c3fb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d744f121ee858da2db4a516ea3f54cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e57c76abca2467af86f45da0fec08cb.png)
(2)问题探究:如图2,在等腰直角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/777b2fbc01cfc26cde436f625a5b7cb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/526108bb5ea7ed33052b0eb47072bc34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ccd5c41c921836b50f8e18abfdc5df3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31b2cc1d0bfd22c88286880b9da1f6f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a48a908fd75d2684e2e848897b45bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(3)拓展延伸:在平面直角坐标系中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa508c303911aff49a9697974a0ef358.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/777b2fbc01cfc26cde436f625a5b7cb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/526108bb5ea7ed33052b0eb47072bc34.png)
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