如图1,四边形
中,
,
,
,E、F分别为
、
上一点,G为
延长线上一点,
,
的延长线交
于M,交
的延长线于点N,
,
.
;
②试判断四边形
的形状,并加以证明;
(2)如图2,过点M作
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9060f03b9ee41d70d135b1e1a8902ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15f0d3d800ff70b765756ead8ca8d089.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16c02bf31ff92fa6629a5c1c2d04433f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/124b73669e668c43d99e039802cd0112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/601d46767f69ece2c4b6f292bca310ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0ea0fa5b4aae3891993f6cd4f9ca1f6.png)
②试判断四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ebce3ae37dbd6fc52dee9e1e826cd1f.png)
(2)如图2,过点M作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab091f054bb770b8a830c2f5c21fd9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/789f30ccb941dc8f0be557bba40aac56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cae1e86633da333f525bc8af73939e40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/999a995a6d07c561ce64e8952994160a.png)
22-23八年级下·辽宁大连·期末 查看更多[2]
更新时间:2023-07-21 22:10:48
|
相似题推荐
解答题-作图题
|
较难
(0.4)
【推荐1】如图1,已知四边形ABCD是正方形,对角线AC、BD相交于点E,以点E为顶点作正方形EFGH.
(1)如图1,点A、D分别在EH和EF上,连接BH、AF,直接写出BH和AF的数量关系;
(2)将正方形EFGH绕点E顺时针方向旋转.
①如图2,判断BH和AF的数量关系,并说明理由;
②如果四边形ABDH是平行四边形,请在备用图中补全图形;如果四方形ABCD的边长为
,求正方形EFGH的边长.
(1)如图1,点A、D分别在EH和EF上,连接BH、AF,直接写出BH和AF的数量关系;
(2)将正方形EFGH绕点E顺时针方向旋转.
①如图2,判断BH和AF的数量关系,并说明理由;
②如果四边形ABDH是平行四边形,请在备用图中补全图形;如果四方形ABCD的边长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/2018/7/19/1992109902389248/1993034718519297/STEM/b096caf0b05342a6add73002785735cc.png?resizew=189)
![](https://img.xkw.com/dksih/QBM/2018/7/19/1992109902389248/1993034718519297/STEM/7a69c17008b24e418f78788678f01726.png?resizew=222)
![](https://img.xkw.com/dksih/QBM/2018/7/19/1992109902389248/1993034718519297/STEM/d6cf5fd9112f4f68a1ccb78ade295412.png?resizew=114)
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解答题-问答题
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【推荐2】如图,在平面直角坐标系中,直线BC的解析式为
,直线BC交x轴和y轴分别于点B和点C,抛物线
交x轴于点A和点B,交y轴于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/27/1147fa40-0f4e-4682-b598-8805ca074d49.png?resizew=516)
(1)求抛物线的解析式;
(2)点P是第二象限抛物线上的点,连接PB、PC,设点P的横坐标为t,
的面积为S.求S与t的函数关系式(不要求写出t的取值范围);
(3)在(2)的条件下,点D在线段
上,连接PD、CD,
,点F在线段BC上,
,FE的延长线交x轴于点G,交PD于点E,连接CE,若
,
,
,求点P的横出标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca621dc42304f844ac15dad7062d3959.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6a4f61e20afafd9a2fde4f6c406c8c4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/27/1147fa40-0f4e-4682-b598-8805ca074d49.png?resizew=516)
(1)求抛物线的解析式;
(2)点P是第二象限抛物线上的点,连接PB、PC,设点P的横坐标为t,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
(3)在(2)的条件下,点D在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a372f9723c974ffbd20c1947e6007be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc90fee532e50d319081d571410421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0dc667b577e094dbe18354df8b5af9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8199e2fe9e85fa6641e7829a57bdfffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45bead63640aa84e238c9cec0436dd6.png)
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解答题-证明题
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【推荐1】如图,在等腰
中,
,
,点
是边
的中点,点 ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
在边 ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
上 ,点 ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
在射线 ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
上 ,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/17/1b8cf39f-6a29-4089-b84c-03201fe0d23c.png?resizew=675)
(1)如图1,当
时,请直接写出
,
,
三条线段之间的数量关系:______:
(2)如图2,当
时,请写出
,
,
三条线段之间的数量关系,并证明你的结论;
(3)当
时,
,
,请直接写出线段 ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
的长 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6988b81937a2b98659c359d9ed686146.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1c912073d11ed0754e82d15e1995ae.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/17/1b8cf39f-6a29-4089-b84c-03201fe0d23c.png?resizew=675)
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfba7739a970050fe0c76a7cb411e94b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc8e9257b4c51c2a45c72099d209e806.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebb036b39afe356133cd859f7252ae72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0fc232acd89fc499de346969ce8ced1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】定义:有一组对边平行,有一个内角是它对角的两倍的凸四边形叫做倍角梯形.
如图1,直线
,点
、
在直线
上,点
、
在直线
上,若
, 则四边形
是倍角梯形.
(1)如图2,点
是
的边
上一点,
,
,
.若四边形
是倍角梯形,则
的长是___________;
(2)如图3,以
的顶点
为坐标原点,边
所在直线为
轴,对角线
所在直线为
轴,建立平面直角坐标系.点
是边
上一点,满足
.求证:四边形
是倍角梯形;
(3)在(2)的条件下,当
,
时,将四边形
向左平移
个单位后,恰有两个顶点落在反比例函数
的图像上,直接写出
的值.
如图1,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/027830fc47290062692964077ee481e4.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/2e9b0f5f44abbc6544a2f672b025b013.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/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa75042a1b71b01f96b68f17aa5893a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/12/8d050d78-db12-46f9-a08b-13a621447b43.png?resizew=541)
(1)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86338536656046e93b53672ade9a78b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)如图3,以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19ae605450a061db0930b28a643d64e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
(3)在(2)的条件下,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9db203a75be4335050febf55bc53d596.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32436704a722d5e568ff5c175bf3c662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70444e3a66d1068038c5b5a77c7954aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
解答题-证明题
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较难
(0.4)
名校
解题方法
【推荐1】如图,已知在直角
中,
,
为
边上一点,连接
,过
作
,交
边于点
,
(1)如图1,若
,
,
,求
;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/2d281064-0d68-4772-86db-a3f88af6fd60.png?resizew=188)
图1
(2)如图2,作
的角平分线交
于点
,连接
,若
,求证:
;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/5584595f-ad51-4bc9-b3ab-fdd0c4957027.png?resizew=181)
图2
(3)如图3,在(1)的条件下,
为
边的中点,
为
边上一个动点,连接
,将
沿
翻折,得到
,连接
,以
为斜边向右作等腰直角三角形
,连接
,求
的最小值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/13a714f6-2773-4211-8ac0-dad4a462798a.png?resizew=199)
图3
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b84c9d873289f99d8eb733d12899280.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72ae36029429324563cd707fcef0bdd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5ef019685cfdde5bb909ff65f80875e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2ab11d19f5be652857e641695792a70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e279445eb4a82e4d7d3b1931e7bb2f62.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/2d281064-0d68-4772-86db-a3f88af6fd60.png?resizew=188)
图1
(2)如图2,作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e543967ad7bd02e3bd7196c19d46f1d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d814a3bbafc5a442e076d0ca1e9113ca.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/5584595f-ad51-4bc9-b3ab-fdd0c4957027.png?resizew=181)
图2
(3)如图3,在(1)的条件下,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67c015d99f2677951bdcd0447240ef93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b388b87b1dca3a2f9e7c2114d2c8b98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67c015d99f2677951bdcd0447240ef93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a83376c9b6c33e05fbdeb2cb776d00b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a21897349d3d7c94419692106887153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a21897349d3d7c94419692106887153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da092a6b13feebdecdbfc7a1f6c8ff98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/13a714f6-2773-4211-8ac0-dad4a462798a.png?resizew=199)
图3
您最近一年使用:0次
【推荐2】某学校活动小组在作三角形的拓展图形,研究其性质时,经历了如下过程:
操作发现:
(1)如图1,分别以AB和AC为边向△ABC外侧作等边△ABD和等边△ACE,连接BE、CD,请你完成作图并证明BE=CD.(要求:尺规作图,不写作法但保留作图痕迹)
类比探究:
(2)如图2,分别以AB和AC为边向△ABC外侧作正方形ABDE和正方形ACFG,连接CE、BG,则线段CE、BG有什么关系?说明理由.
灵活运用:
(3)如图3,在四边形ABCD中,AC、BD是对角线,AB=BC,∠ABC=60°,∠ADC=30°,AD=3,BD=5,求CD的长.
操作发现:
(1)如图1,分别以AB和AC为边向△ABC外侧作等边△ABD和等边△ACE,连接BE、CD,请你完成作图并证明BE=CD.(要求:尺规作图,不写作法但保留作图痕迹)
类比探究:
(2)如图2,分别以AB和AC为边向△ABC外侧作正方形ABDE和正方形ACFG,连接CE、BG,则线段CE、BG有什么关系?说明理由.
灵活运用:
(3)如图3,在四边形ABCD中,AC、BD是对角线,AB=BC,∠ABC=60°,∠ADC=30°,AD=3,BD=5,求CD的长.
![](https://img.xkw.com/dksih/QBM/2020/11/7/2587906408701952/2588479297200128/STEM/318b5594c13847c7bdbd4ed9d604fdf2.png?resizew=430)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】如图,等边三角形
,点D在射线
上,
,点E在
上(点E不与点B,C重合),射线
交射线
于点G,将射线
烧点E顺时针旋转
交
于点F,过点E作
于点M.
,直接写出
与
的数量关系;
(2)如图2,若
,请写出
与
的数量关系,并说明理由;
(3)若
,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2e36fe861dbf3d8e285110a283c4c61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aed578e73beb2a0a3550dc5419e09d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c503e29373e8d87134bdb46bd3912910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/673a7242e9a17d12438d7eb1b97bd54f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/273f3bfadb20a0146026c8a55ff382da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cacfb737e4e8de30779c368553924433.png)
您最近一年使用:0次
【推荐2】如图,在四边形
中,
,
,
,
,
,点
从点
出发以
的速度向点
运动.点
从点
出发以
的速度向点
运动.
,
两点同时出发,当点
到达点
时.两点同时停止运动.若设运动时间为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ca07a30fd25907fbb2f54e0d639b512.png)
(1)直接写出:
______
,
______
;(用含
的式子表示)
(2)当
为何值时,四边形
为平行四边形?试说明理由.
(3)若点
与点
不重合,且
,当
为何值时,
是等腰三角形?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6996aa31bf1486ced60c2249a6e6989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf2732c063f01d83e8f7cfc2b138732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6747441b260ca043446b5d472fece440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5631e6ec24d3d67bf4592313b6b3f4f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d989a128e30a701dfff5592476a76bab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ca07a30fd25907fbb2f54e0d639b512.png)
(1)直接写出:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/179ac75dda32371779a3acf7bb0468cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33e7d551cca653e2d638c8cab4c2fda8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5959113de815ad1dc1227583ce0c3920.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59d72b5f777caa5de9ce43b3abad1925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/129f1d6567bef09b00b7f37894e6dba7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/f14756f7-556c-44b9-ae83-3ef2839a6ecd.png?resizew=180)
您最近一年使用:0次