如图,在
中,
的平分线交
于点E,
的平分线交
于点F.
(1)求证:四边形
是菱形;
(2)若
, 则
的面积是 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7288ebd6d703b4d56fb29a2f49ddc625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/ea73299a-5f19-4d7a-a92d-cdf818963d5c.png?resizew=237)
更新时间:2018-05-08 13:28:43
|
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解答题-证明题
|
适中
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【推荐1】已知:∠MON=α,点P是∠MON角平分线上一点,点A在射线OM上,作∠APB=180°-α,交直线ON于点B,PC⊥ON于C.
(1)如图1,若∠MON=90°时,求证:PA=PB;
(2)如图2,若∠MON=60°时,写出线段OB,OA及BC之间的数量关系,并说明理由;
(3)如图3,若∠MON=60°时,点B在射线ON的反向延长线上时,(2)中结论还成立吗?若不成立,直接写出线段OB,OA及BC之间的数量关系(不需要证明).
(1)如图1,若∠MON=90°时,求证:PA=PB;
(2)如图2,若∠MON=60°时,写出线段OB,OA及BC之间的数量关系,并说明理由;
(3)如图3,若∠MON=60°时,点B在射线ON的反向延长线上时,(2)中结论还成立吗?若不成立,直接写出线段OB,OA及BC之间的数量关系(不需要证明).
![](https://img.xkw.com/dksih/QBM/2018/2/10/1879526954737664/1880920622317568/STEM/934d1bf4101344d7ac31a19ee076ab0d.png?resizew=445)
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解答题-问答题
|
适中
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【推荐2】如图,在
中,
,
,
平分
交
于点P,若
,
.回答问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/8f169584-0732-4b3e-93c9-434d1dce875e.png?resizew=154)
(1)P到
的距离
长为______,
的周长为______;
(2)求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eea78bf026d76f1cb9cc3dc9349a193.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4b1fdfa6c28c7b4113ba306547aa4b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/8f169584-0732-4b3e-93c9-434d1dce875e.png?resizew=154)
(1)P到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0bb4ef08f6070a6bbc54ea9c4f130d5.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af2cc5f8cec8c498aa12c99c04e1c97d.png)
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解答题-作图题
|
适中
(0.65)
【推荐1】如图是由小正方形组成的
网格,每个小正方形的顶点叫做格点,
的三个顶点都是格点,仅用无刻度的直尺在给定网格中完成画图,画图过程用虚线表示.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/15/7b218103-018f-41fb-91e2-c70aa08ccdf6.png?resizew=204)
(1)在图中画出平行四边形
,
为格点;
(2)在
边上画一点
,使得
;
(3)找到格点
,画出直线
,使得
平分平行四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd12b1e161e68c936f57aea483e20d5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/15/7b218103-018f-41fb-91e2-c70aa08ccdf6.png?resizew=204)
(1)在图中画出平行四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e78ee2cb6caf7d7ee877796d18e53907.png)
(3)找到格点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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解答题-问答题
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【推荐2】如图,已知
三点,直线
与反比例函数
上在第一象限的图象交于点
,连接
.
和反比例函数
的表达式.
(2)点P在反比例函数的图象上,点Q在直线
上,若以D,C,P,Q为顶点的四边形是以
为一边的平行四边形,请直接写出所有符合条件的Q点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dabd76c5fa4d4a49f804242cee397bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b8538c14a7f486fe31812a6c64e74f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
(2)点P在反比例函数的图象上,点Q在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
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解答题-作图题
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适中
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真题
【推荐1】如图,在平面直角坐标系中,Rt△ABC的三个顶点分别是A(-3,1),B(0,3),C(0,1).
(1)将△ABC以点C为旋转中心旋转180°,画出旋转后对应的△A1B1C;
(2)分别连接AB1,BA1后,求四边形AB1A1B的面积.
(1)将△ABC以点C为旋转中心旋转180°,画出旋转后对应的△A1B1C;
(2)分别连接AB1,BA1后,求四边形AB1A1B的面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/15/7c6d4fa4-59fb-4b2b-b5c4-490d03ad3546.png?resizew=214)
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解答题-问答题
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【推荐2】如图,矩形ABCD的对角线AC与BD相交于点O,CE
BD,DE
AC,AD=
,DE=2,求四边形OCED的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://img.xkw.com/dksih/QBM/2022/3/12/2934397572988928/2935564810199040/STEM/bf1ca149-8470-4613-92b2-bc4f8e6a79ac.png?resizew=196)
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解答题-证明题
|
适中
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【推荐1】如图,在平行四边形ABCD中,点M,N分别在AB,CD上,AC与MN交于点O,且AO=CO,连接AN,CM.
(1)求证:AM=CN;
(2)已知:AC=8,MN=6,且MN⊥AC,求四边形AMCN的周长.
(1)求证:AM=CN;
(2)已知:AC=8,MN=6,且MN⊥AC,求四边形AMCN的周长.
![](https://img.xkw.com/dksih/QBM/2021/7/31/2775852966715392/2777567456575488/STEM/afb8aa9b-5225-41c8-a3ca-fd04902343fa.png)
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解答题-证明题
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适中
(0.65)
【推荐2】如图,矩形
的对角线交于点
,且
,
.
(1)求证:四边形
是菱形;
(2)连接
,若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca14fa885a9d04f04e0418b49b118241.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1f406b3ff8561a371a39908fd813f4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/23/614ee4fd-23bf-477e-ba17-bfa4b8494083.png?resizew=211)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5a6e2ab0a2c893dc495df33e5ee092d.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
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