已知正方形
的边长为6,动点
分别在边
上运动,连接
.
(1)如图1,过
作
交边
于点
,交
于点
.
i)若
为
的中点,
为
的中点,求
的长;
ⅱ)探索线段
之间的数量关系,写出你的结论并证明.
(2)如图2,将四边形
沿
翻折得到四边形
与
相交于点
,调整点
和点
的位置使得线段
始终经过顶点
.
i)若点
到
的距离
,求
的长;
ⅱ)点
到
的距离是否存在最大值?若存在,请直接写出这个最大距离;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c4cd264c97c1f261229925cc5a6761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/10/445e3f49-e18c-4ae1-aea6-6a8445afd797.png?resizew=380)
(1)如图1,过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5e08ce4a6ff34c0b2c22e736b5df378.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
i)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
ⅱ)探索线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9472fcf2153da09352e6f48ce04d86c.png)
(2)如图2,将四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e826b8202fa0e17245dcc68426c923a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/424a6ad8f5518f9afa3abe0ab61a7df1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/e737bc35da650eda3825d29799b5f86f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
i)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95cefc34566f034e648d9e52d730933d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
ⅱ)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
更新时间:2023-05-30 18:49:08
|
相似题推荐
解答题-证明题
|
困难
(0.15)
名校
【推荐1】如图,在
中,
,点
、
分别在
、
上,且满足
,延长
交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/8004f22a-ba48-499b-a04a-08eab6ddc191.png?resizew=405)
(1)如图1,若
.
①求证:
平分
;
②求证:
;
(2)如图2,过点
作
,交
的延长线于点
,若
,
,记
的面积为
,
的面积为
,求
的值(用含
、
的式子表示).
![](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/8455657dde27aabe6adb7b188e031c11.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd9e0ed14220a8eb725d7699ac6dcde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/8004f22a-ba48-499b-a04a-08eab6ddc191.png?resizew=405)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/008cb8e6af10631629142708fe6bcf6f.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
②求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd56d56532291fdb56613e731ae8b20.png)
(2)如图2,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebbf8afe1b842304143eded763fb332b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dcdd87cc1a31bf11c81b0dab531b29a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9ff0d3d7b3e9708285e3511a19e2531.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235f0a6fb218d28383e6f27f2df1f50f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
您最近一年使用:0次
【推荐2】如图,矩形ABCD中,AB=4,AD=3,∠A的角平分线交边CD于点E.点P从点A出发沿射线AE以每秒2个单位长度的速度运动,Q为AP的中点,过点Q作QH⊥AB于点H,在射线AE的下方作平行四边形PQHM(点M在点H的右侧),设P点运动时间为
秒.
![](https://img.xkw.com/dksih/QBM/2020/7/27/2514752565198848/2515382190252032/STEM/2c2a0dcf-99f7-4ecc-a549-dc24a1c57143.png?resizew=209)
(1)直接写出
的面积(用含
的代数式表示).
(2)当点M落在BC边上时,求
的值.
(3)在运动过程中,整个图形中形成的三角形是否存在全等三角形?若存在,请写出所有全等三角形,并求出对应的
的值;若不存在请说明理由(不能添加辅助线).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/2020/7/27/2514752565198848/2515382190252032/STEM/704d6080-6783-4028-a823-fd60fb69a618.png?resizew=199)
![](https://img.xkw.com/dksih/QBM/2020/7/27/2514752565198848/2515382190252032/STEM/2c2a0dcf-99f7-4ecc-a549-dc24a1c57143.png?resizew=209)
(1)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdc6ff5f444a5eabd8c135b7ff1c9fc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)当点M落在BC边上时,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)在运动过程中,整个图形中形成的三角形是否存在全等三角形?若存在,请写出所有全等三角形,并求出对应的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
【推荐1】如图,在正方形
中,
,
为
上一点,以
为直角边构造等腰直角
(点
在
左侧),
交
于点
,分别延长
,
相交于点
,
交
于点
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/943837f6-118f-4256-83e2-a73b5cf5a28a.png?resizew=194)
(1)求证:
.
(2)当
时,求
的值.
(3)当点H关于直线
的对称点落在
的边上时,求
的度数.
(4)若
与
的面积相等,求
与
面积的比值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319a01218514917e446dfc807a625ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/943837f6-118f-4256-83e2-a73b5cf5a28a.png?resizew=194)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8b03ec009adde032180db13f2b21d6e.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7951f5af8359d2e1cdb1a6e008c91a18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b57f92895021820cb3f27522eabebe6.png)
(3)当点H关于直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79cd9d0d73549e2944578f3513631ce5.png)
(4)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc5c12b241539cc99487865f7d8bf34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2689f0ce5ab3467d8214794d8acb2bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc6fe7ef5fca37baa3cc7fb984cb6e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
您最近一年使用:0次
解答题-作图题
|
困难
(0.15)
【推荐2】已知正方形
和等腰
,
且
,连接
.
在正方形
的内部时,若
平分
,
,则
________
,四边形
的面积为________;
(2)当点
在正方形
的外部时,
①在图2中依题意补全图形,并求
的度数;
②作
的平分线
交
于点
,交
的延长线于点
,连接
.用等式表示线段
,
,
之间的数量关系,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/403d74859e7b8b4cebf40add6e92b0f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d8ce3af4777d0267b103c1efe8513c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29aa9dd7f622be9c44c8daacdf9d1af9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e1e8d3e9fe016f1581fc5d16c36d12b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b027ed57b9c6f24e27ec0ae282c76efa.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
①在图2中依题意补全图形,并求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac3c1375c64dceef45846308a418cf7f.png)
②作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d9cc98e6df306063e645044f0faa7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf25e032b5599ac49383de06e776365.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf702adb116c1e46569eb7050d029f49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐3】对于二次函数给出如下定义:在平面直角坐标系
中,二次函数
(
,
,
为常数,且
)的图象顶点为
(不与坐标原点重合),以
为边构造正方形
,则称正方形
为二次函数
的关联正方形,称二次函数
为正方形
的关联二次函数.若关联正方形的顶点落在二次函数图象上,则称此点为伴随点.
(1)如图,直接写出二次函数
的关联正方形
顶点
的坐标______,并验证点
是否为伴随点______(填“是”或“否”);
(2)当二次函数
的关联正方形
的顶点
与
位于
轴的两侧时,请解答下列问题:
①当关联正方形
的顶点
是伴随点时,求关联函数
的解析式;
②关联正方形
被二次函数
图象的对称轴分成的两部分的面积分别为
与
,若
,请直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0402c7e8ed10c0d1c56c318fb58e69b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0402c7e8ed10c0d1c56c318fb58e69b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0402c7e8ed10c0d1c56c318fb58e69b6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/15/9be3f23f-4a34-4900-bb93-9b5f9b63e16f.png?resizew=213)
(1)如图,直接写出二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65e53aa385e05eb945417b26c9b49051.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0402c7e8ed10c0d1c56c318fb58e69b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
(2)当二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb2025bef04d171d1e85e7c5f8d77d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0402c7e8ed10c0d1c56c318fb58e69b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
①当关联正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0402c7e8ed10c0d1c56c318fb58e69b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb2025bef04d171d1e85e7c5f8d77d9.png)
②关联正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0402c7e8ed10c0d1c56c318fb58e69b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb2025bef04d171d1e85e7c5f8d77d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09062a0806cd4a212f0dc58c5bb35552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
名校
解题方法
【推荐1】如如图,将一个直角三角形纸片AOB,放置在平面直角坐标系中,已知点O(0,0),点B在y轴的正半轴上, OA=2,∠ABO=90°,∠AOB=30°.D,E两点同时从原点O出发,D点以每秒
个单位长度的速度沿x轴正方向运动,E点以每秒1个单位长度的速度沿y轴正方向运动,连接DE,交OA于点F,将△OEF沿直线DE折叠得到△O′EF,设D,E两点的运动时间为t秒.
的坐标及
的度数;
(Ⅱ)若折叠后
与
重叠部分的面积为
,
①当折叠后
与
重叠部分的图形为三角形时,请写出
与
的函数关系式,并直接写出
的取值范围;
②当重叠部分面积最大时,把
绕点
旋转,得到
,点
的对应点分别为
,连接
,求
面积的最大值(直接写出结果即可).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c3f8c3ba00c59e0634ed10fa85289de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ea2f6098be91fa704dc562b62471362.png)
(Ⅱ)若折叠后
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd18b041e07cd09107c4b30156f4a09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
①当折叠后
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd18b041e07cd09107c4b30156f4a09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
②当重叠部分面积最大时,把
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/327ea2dc992df220e23903887ea575af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e310ac26049fd114f77837f60938a17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26e9f6c6ace67f591c80b27a20c298ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5671fb25040a712a49e8c8148d67d300.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
您最近一年使用:0次
【推荐2】定义:在平面直角坐标系中,抛物线y=a
+bx+c(a≠0)与直线y=m交于点A、C(点C在点A右边)将抛物线y=a
+bx+c沿直线y=m翻折,翻折前后两抛物线的顶点分别为点B、D.我们将两抛物线之间形成的封闭图形称为惊喜线,四边形ABCD称为惊喜四边形,对角线BD与AC之比称为惊喜度(Degreeofsurprise),记作|D|=
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/6/02dfda5c-31e7-4ddf-836f-57c0585af165.png?resizew=298)
(1)图①是抛物线y=
﹣2x﹣3沿直线y=0翻折后得到惊喜线.则点A坐标 ,点B坐标 ,惊喜四边形ABCD属于所学过的哪种特殊平行四边形 ,|D|为 .
(2)如果抛物线y=m
﹣6m(m>0)沿直线y=m翻折后所得惊喜线的惊喜度为1,求m的值.
(3)如果抛物线y=
﹣6m沿直线y=m翻折后所得的惊喜线在m﹣1≤x≤m+3时,其最高点的纵坐标为16,求m的值并直接写出惊喜度|D|.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0a89e3c30f6e4d4c5db4378b05d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0a89e3c30f6e4d4c5db4378b05d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d78c44f837a63101c19745cc1a79a740.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/6/02dfda5c-31e7-4ddf-836f-57c0585af165.png?resizew=298)
(1)图①是抛物线y=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0a89e3c30f6e4d4c5db4378b05d987.png)
(2)如果抛物线y=m
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41efc52a763dca3268ed0a94740b25bb.png)
(3)如果抛物线y=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41efc52a763dca3268ed0a94740b25bb.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
【推荐1】【特例感知】
中,点P在边
的延长线上,连接
,过点D作
,交
的延长线于点M.求证:
.
【变式求异】
(2)如图2,在
中,
,点D在边
上,过点D作
,交
于点Q,点P在边
的延长线上,连接
,过点Q作
,交射线
于点M.已知
,
,
,求
的值.
【拓展应用】
(3)如图3,在
中,
,点P在边
的延长线上,点Q在边
上(不与点A,C重合),连接
,以Q为顶点作
,
的边
交射线
于点M.若
,
(m,n是常数),直接写出
的值(用含m,n的代数式表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](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/0d4db5b8e1be98e467b6f0540ab3466c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57120c4c2a04315b21ad42787b0c9e29.png)
【变式求异】
(2)如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f78bc6606b08ba600102d95e6418325.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/329c893cdaede883a62f613c46d86928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/addb8e20db1fbb40f17dea52f951b907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50196d293a863fe2f9e46199052ab8c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b9d2ecb2dd842f8dc4fae3c42e26ee1.png)
【拓展应用】
(3)如图3,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.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/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c3aa00e202fc89fb05d58d371f2b78b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22b4eea854f71c03b451cd3005119f38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db8305c4ffbf876642440c3d28e91e9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac82ae472f33ceb1c9139a05506d61d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae35e5215a1461968065017569e48254.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b9d2ecb2dd842f8dc4fae3c42e26ee1.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
【推荐2】如图,在等腰△ABC中,AB=AC,D,E分别为边BC和AC的中点,点F在AC上,且BF=BC,点G在AD上,且FG⊥FB.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/17/b1a9603f-dd29-4fce-9192-36713a71c203.png?resizew=150)
(1)求证:AG=FG;
(2)若BC=8,AD=8
,求AG的长;
(3)连接GE,直接写出GE的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/17/b1a9603f-dd29-4fce-9192-36713a71c203.png?resizew=150)
(1)求证:AG=FG;
(2)若BC=8,AD=8
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(3)连接GE,直接写出GE的长.
您最近一年使用:0次