如图,在四边形
中,
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/6/67683981-dee1-4163-ab14-671516dec7a9.png?resizew=160)
(1)求证:四边形
是菱形;
(2)延长
至点
,连接
交
于点
,若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a23f35ebcd9799d82c1e41c09781a4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0866e1551b61074ca8e61261ecd1f9dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd0763b031b7e6b6d87ce3554ac482d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b707c3d2dcf2f53fea4ef045dd8f295.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/6/67683981-dee1-4163-ab14-671516dec7a9.png?resizew=160)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b2ea11f04083ceea75e545382278330.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eca51ab4529710dd8662ae442f608fd.png)
更新时间:2024-03-21 20:26:51
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相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】综合与实践
如图,在
中,
,点P以每秒2个单位长度的速度从点A出发,沿
方向向终点B匀速运动,同时点Q以每秒1个单位长度的速度从点C出发,沿
方向向终点A匀速运动,连接
.设运动的时间为t秒.
的长(用含t的代数式表示).
(2)当
秒时,求
的面积.
(3)如图2,连接
,当
为直角三角形时,求所有满足条件t的值.
如图,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28566f1730c77064e01fd0d81947c0e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66884efff7400f92b530d69d029778d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
(3)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8dcc9f79fe5f07f25447aa442ee14ad.png)
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【推荐2】如图,已知
与x轴交于A、B两点,交y轴于C,连接
,
,过A作
的平行线交抛物线于点D.
的形状;
(2)点P是
上方抛物线上的一点,过点P作
于F,作
轴交
于点Q,交
于E,当
最大时,将
沿射线
平移得
,当点
与Q重合时停止运动,点M在
上,点N在
上,求
的最小值;
(3)如图2,将
绕点A顺时针旋转得
,当点
落在抛物线的对称轴上时停止旋转,在x轴上有一动点H,连接
,将
翻折得到
,是否存在点H,使得
为等腰三角形?若存在,求出点H的坐标,若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef76b82baa3b9d72964c6fbdeb61beb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)点P是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7edadd9995393ece0d7b7bf4801504bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/213144e25996b7fd3cd69d9c5ae56be2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9adb577d753a8d872cbe9fd1b49886c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5adccd1dd14171c8c29d4a3836728c0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d054e46eed89af4543b18d0f6d66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e55590555905eb4f57889bbd16e39a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f5d6fec63e88f7d30e0281d1f644529.png)
(3)如图2,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce09f859f4d383bab95282f5824abc00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5326817f9af012432a202749d1df59f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12b51d152b7f41a3c2ba7e1d365e0221.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2b925cc5bc7844d77d602f5080bd1ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f66cba2730ce96d6df9ed7151aa6d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e5c23c6c1b281981caa4757ebb8a760.png)
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名校
【推荐1】如图,在△ABC的外接圆⊙O中,OB⊥AC交AC于点E.延长BE至点D,使得BE=DE,连接AD,CD,其中CD与⊙O相交于点F,连接AF交BD于点G.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/8fb77b5e-7ec0-4e13-82c9-476f31e2ac94.png?resizew=162)
(1)求证:四边形ABCD是菱形.
(2)求证:AD=AF.
(3)若DG=DF,求
的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/8fb77b5e-7ec0-4e13-82c9-476f31e2ac94.png?resizew=162)
(1)求证:四边形ABCD是菱形.
(2)求证:AD=AF.
(3)若DG=DF,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/924f4c8d6cb5dfcf75e82d818381139f.png)
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【推荐2】在平面直角坐标系中,如果点
、点
为某个菱形的一组对角的顶点,且点
、
在直线
上,那么称该菱形为点
、
的“极好菱形”,如图为点
、
的“极好菱形”的一个示意图.
![](https://img.xkw.com/dksih/QBM/2019/8/9/2265065609453568/2265090239332352/STEM/483b99737d07486784fce86312c3d130.png?resizew=416)
(1)点
,
,
中,能够成为点
、
的“极好菱形”的顶点的是_______.
(2)若点
、
的“极好菱形”为正方形,则这个正方形另外两个顶点的坐标是________.
(3)如果四边形
是点
、
的“极好菱形”
①当点
的坐标为
时,求四边形
的面积
②当四边形
的面积为
,且与直线
有公共点时,直接写出
的取值范围.
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/2019/8/9/2265065609453568/2265090239332352/STEM/483b99737d07486784fce86312c3d130.png?resizew=416)
(1)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e4c60a39479f30736dde0c6085833b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e11e09637c8dd8b8d44b942c86226c54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48c7282b6e6f9893aa6a06a9c5529c9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)如果四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
①当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0481d24e2af1e0cd348732b9444d1dde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
②当四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07565f10847840e0fb07b05218ad17fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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解题方法
【推荐1】在△ABC中,∠BAC=90°,AB=AC.
(1)如图1,过点C作CD⊥BD交AB于M,若BM=2,tan∠DCB=
.求DM的长;
(2)如图2,若AD⊥AE,且AD=AE,延长AD、CB交于点F,作EG⊥EA交CB于点G.猜想FD、CE、EG之间有何数量关系?并证明你的结论.
(3)如图3,若AB=4
,D为一动点且始终有BD⊥CD,取CD的中点M,连接BM,将MB绕点B逆时针旋转90°得到点E,直接写出△ABE面积的最大值.
(1)如图1,过点C作CD⊥BD交AB于M,若BM=2,tan∠DCB=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
(2)如图2,若AD⊥AE,且AD=AE,延长AD、CB交于点F,作EG⊥EA交CB于点G.猜想FD、CE、EG之间有何数量关系?并证明你的结论.
(3)如图3,若AB=4
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/2021/12/14/2872156545015808/2872355597115392/STEM/4559c47c-a6ab-4935-a1a7-6134cf8b51c4.png?resizew=761)
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【推荐2】如图,在四边形ABCD中,
,
.点P从A点出发,沿AB向点B匀速运动,同时点Q从B点出发,沿BC向点C匀速运动,运动速度均为
的速度,当其中一点到达终点时,两点都停止运动.设运动时间为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/26/bacce8a7-230a-4bd7-abaf-fb409697df4e.png?resizew=268)
(1)求线段AB的长度;
(2)t为何值时,以B、P、Q为顶点的三角形与
相似?
(3)是否存在某一时刻t,使得四边形
的面积等于
?若存在,求出此时t的值;若不存在,说明理由.
(4)是否存在某一时刻t,使
?若存在,直接写出此时t的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e998562fce4867b0087bb67e33647be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e829dbb369d553242c07c50264801a96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a1cc70dc19b7bc5fd07cc00c92fd08.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/26/bacce8a7-230a-4bd7-abaf-fb409697df4e.png?resizew=268)
(1)求线段AB的长度;
(2)t为何值时,以B、P、Q为顶点的三角形与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
(3)是否存在某一时刻t,使得四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/319520c884008883bf227b21ac60b19b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5201011c53d29ad654eb07ee945c505d.png)
(4)是否存在某一时刻t,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bbc27d36cc39b7e634c51b944c9a947.png)
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