如图,在Rt△ABC中,
,
,
,D是AC边上的中点,过点C作AC的垂线CE,过点D作BC的平行线,交CE于点E,点P从点E到点D沿ED方向匀速运动,速度为2cm/s,同时点Q从点B到点C沿BC方向匀速运动,速度为1cm/s.连接PQ,过点P作
于点F,连接FQ.设运动时间为t(s(
),解答下列问题:
![](https://img.xkw.com/dksih/QBM/2022/4/22/2963741622116352/2966695506632704/STEM/cdb4c598-5a98-4ba0-9d3b-000a1e300fd0.png?resizew=314)
(1)当t为何值时,四边形BDPQ为平行四边形?
(2)当t为何值时,点P在∠ABC的平分线上?
(3)设四边形EFQP的面积为S,写出S与t的函数关系式.
(4)当P关于CE的对称点
落在BC的延长线上时,△FPQ的面积是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cee49e97546d466ba3ee630e08cdc3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c545764505bb00578a870c5e39493a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e48ec323eb922d8f95970689e411021.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b696fa8fd1e374d3c615c81047db4bad.png)
![](https://img.xkw.com/dksih/QBM/2022/4/22/2963741622116352/2966695506632704/STEM/cdb4c598-5a98-4ba0-9d3b-000a1e300fd0.png?resizew=314)
(1)当t为何值时,四边形BDPQ为平行四边形?
(2)当t为何值时,点P在∠ABC的平分线上?
(3)设四边形EFQP的面积为S,写出S与t的函数关系式.
(4)当P关于CE的对称点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d57d7dd861286e5ee6ec8dff0e19c5.png)
更新时间:2022-04-26 21:40:22
|
相似题推荐
解答题-证明题
|
困难
(0.15)
【推荐1】如图1,在
中,
.点
是
边上的动点,连结
,将
绕点
旋转至
,使点
与点
重合,连结
交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/29/c0b63e5e-abb2-4c49-b8b1-eff2f1450eac.png?resizew=391)
(1)当点
为
中点时,线段
___________;
(2)如图2,作
交
于点G,连结
交
于点H.求证:四边形
是平行四边形;
(3)在(2)的条件下
①若
,求
的度数;
②连接
,当
时,
____________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bddefabbeb808377158c307bc0d903f7.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/164a4df60a15587971e883cf557b5ce2.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/e6e490f703eb6c9bb1278c78ebc2d661.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/2023/4/29/c0b63e5e-abb2-4c49-b8b1-eff2f1450eac.png?resizew=391)
(1)当点
![](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/404728d0ea2699c71e674f30dd984abd.png)
(2)如图2,作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c05420ab262912cf41f46bc3b0af070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bba134b8dcecf5b81721abe3b34e1b1.png)
(3)在(2)的条件下
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b26537461e34c5ab7fd30476ac25217a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d38c210b4c9dcec1b6a036900c97fa28.png)
②连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5542f3e844536a2b1172aac3bdcb58fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e707a641e89c80100e6e587163b518e6.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
名校
【推荐2】如图①,在
中,
,
的面积为12,点E在边
上,且
,动点P从点E出发,沿折线
以每秒1个单位长度的速度运动到点C停止.将射线
绕点E逆时针方向旋转
得到射线
,点Q在折线段
上,连接
.设点P运动的时间为t(秒)(
).
的长为_______;
(2)当
将
的面积分为
时,求t的取值范围;
(3)如图②,当点Q在边
上时,求
的值;
(4)如图③,作点Q关于
的对称点
,在点P从点E出发运动到点C的过程中,点
经过的路径长为_______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa25a78e7a92d46124cee1cf11c21b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b0393ce62b24aa5f9b740d4cc6743b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ec95931376c93bc467039819e52f00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b15febfda66e733f14aa7115ed4343a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef5d53e570a2f8516c7af8b22662c195.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fff6e7e2b9f2b68b1647f6350b98dc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b15febfda66e733f14aa7115ed4343a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d65e051e943ab28fa57aee2fb57994.png)
(3)如图②,当点Q在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/737e6705cd20300bb669b3fcc3356fef.png)
(4)如图③,作点Q关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a42da28be159399514cc6179a96e34b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a42da28be159399514cc6179a96e34b.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
【推荐1】小明研究了这样一道几何题:如图 1,在ABC 中,把 AB 点 A 顺时针旋转 00 1800 得到 AB ,把 AC 绕点 A 逆时针旋转 得到 AC ,连接 BC .当 180° 时, 请问ABC 边 BC 上的中线 AD 与 BC 的数量关系是什么? 以下是他的研究过程:
![](https://img.xkw.com/dksih/QBM/2020/3/12/2424362929659904/2436829945618432/STEM/d86ed4746a174f6d876913914b9de856.png?resizew=429)
特例验证:
(1)①如图 2,当ABC 为等边三角形时,AD 与 BC 的数量关系为 AD BC ;
②如图 3,当BAC 900 , BC 8时,则 AD 长为 .
猜想论证:
(2)在图 1 中,当ABC 为任意三角形时,猜想 AD 与 BC 的数量关系,并给予证明.
拓展应用
(3)如图 4,在四边形 ABCD ,
,
,
,
,
,在四边形内部是否存在点 P ,使PDC 与PAB 之间满足小明探究的问题中的边角关系?若存在, 请画出点 P 的位置(保留作图痕迹,不需要说明)并直接写出PDC 的边 DC 上的中线 PQ 的长度;若不存在,说明理由.
![](https://img.xkw.com/dksih/QBM/2020/3/12/2424362929659904/2436829945618432/STEM/d86ed4746a174f6d876913914b9de856.png?resizew=429)
特例验证:
(1)①如图 2,当ABC 为等边三角形时,AD 与 BC 的数量关系为 AD BC ;
②如图 3,当BAC 900 , BC 8时,则 AD 长为 .
猜想论证:
(2)在图 1 中,当ABC 为任意三角形时,猜想 AD 与 BC 的数量关系,并给予证明.
拓展应用
(3)如图 4,在四边形 ABCD ,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d614ce93f129002a08456649c8858e07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40df86071b71e59b7ab505f922f25f88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca7e1a727ba332984ad857b3d25344d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53926a8ae1fc1fbd4d7e5256fa8a9e96.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1,在矩形
中,
交
于点G,E为
的中点,
的延长线交
于点F,连接
.
,证明:
;
(2)在(1)的条件下,求
的值;
(3)如图2,若
,M为
的中点,连接
,
﹒已知
.
①求证:
;
②求k的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8944bb1af77920b5018eebf3af16b2b0.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/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d669d800ccb321f841f9b14c5d8300e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cce5d5bbf325276ee0060c694f500ba4.png)
(2)在(1)的条件下,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/029d089050b6a245a087b53c716e6e78.png)
(3)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb29e564dc7c2521c53c48476cd315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2273ae1ee99cec9c1304323bc9ebf75f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aab0b9830a6b9c0b9eeda74f0ee392ba.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33e5e665b365f389768004c58a49cf8c.png)
②求k的值.
您最近一年使用:0次
【推荐1】如图1,在平面直角坐标系中,点A、B、C、D坐标分别为(0,3)、(7,0)、(4,3)、(0,2),连接AC和BC,点P为线段AC上一从左向右运动的点,以PD为边作菱形PDEF,其中点E落在x轴上.
(2)在点P运动过程中,是否能使得四边形PDEF为正方形?若存在,请求出点P的坐标若不存在,请说明理由;
(3)如图2,当点P运动到使得菱形PDEF的顶点F恰好在边BC上时,求出此时点F的坐标.
(4)若要使得顶点F不落在四边形OACB外,请直接写出菱形PDEF的对角线交点的最大运动路径长.
(2)在点P运动过程中,是否能使得四边形PDEF为正方形?若存在,请求出点P的坐标若不存在,请说明理由;
(3)如图2,当点P运动到使得菱形PDEF的顶点F恰好在边BC上时,求出此时点F的坐标.
(4)若要使得顶点F不落在四边形OACB外,请直接写出菱形PDEF的对角线交点的最大运动路径长.
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐2】如图①,在
中,
,
,
,点
是
的中点,点
从点
出发以每秒
个单位的速度沿
向终点
运动
点
、
不重合
,同时点
从点
出发以每秒
个单位的速度沿
向终点
运动,当
、
两点中有一个停止运动另一个也停止运动,以
,
为邻边构造![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81a5328919a7cec382c2e91c9c528fc1.png)
,
、
运动时间为
秒
.
的代数式表示线段
的长是 .
(2)当点
落在
内部时,求
的取值范围.
(3)当点
在
上运动时,连结
,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81a5328919a7cec382c2e91c9c528fc1.png)
为轴对称四边形,求此时
的值.
(4)如图②,作点
关于
的对称点
,连结
,当
与
的边垂直时,直接写出此时的
值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c513dca3b8c31bc8d0ed4301e94cc1e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82da6815bc213dfd78c2f77cd7ded8ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ddeb9efb488b31ae67efd29efd56b3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77847ba0afc18466b17cea483eb29cdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.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/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afff0d3ff003c5336cba7b7ebea9c54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971b23e3ee827018557d6c88edd5369a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/0101a7b5c8a4aed0de2af363792e39a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d57c5366753582457cc87de6e90b302.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81a5328919a7cec382c2e91c9c528fc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce65261ff8a96483038102caf289393.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/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87fbbe4045c6ef4bd3857d45f33b7cf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15bdee7807edba89958c84bf4bb85f15.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41ff8c8d239cc12ddc3a899e9f054aa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37a0397c811fe80c80ecd5b871201987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81a5328919a7cec382c2e91c9c528fc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce65261ff8a96483038102caf289393.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724ac060befb7ba802ce9bfe32226ac0.png)
(4)如图②,作点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/075bc6df108c9c2b3b5ac46bca7c8d3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/075bc6df108c9c2b3b5ac46bca7c8d3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
真题
【推荐3】在平面直角坐标系中,O为原点,四边形OABC的顶点A在
轴的正半轴上,OA=4,OC=2,点P,点Q分别是边BC,边AB上的点,连结AC,PQ,点B1是点B关于PQ的对称点.
(1)若四边形OABC为矩形,如图1,
①求点B的坐标;
②若BQ:BP=1:2,且点B1落在OA上,求点B1的坐标;
(2)若四边形OABC为平行四边形,如图2,且OC⊥AC,过点B1作B1F∥
轴,与对角线AC、边OC分别交于点E、点F.若B1E: B1F=1:3,点B1的横坐标为
,求点B1的纵坐标,并直接写出
的取值范围.
![](https://img.xkw.com/dksih/QBM/2015/8/13/1573896645001216/1573896651513856/STEM/b7cb322d02244ed78a6e9840e109410a.png)
(1)若四边形OABC为矩形,如图1,
①求点B的坐标;
②若BQ:BP=1:2,且点B1落在OA上,求点B1的坐标;
(2)若四边形OABC为平行四边形,如图2,且OC⊥AC,过点B1作B1F∥
![](https://img.xkw.com/dksih/QBM/2015/8/13/1573896645001216/1573896651513856/STEM/b7cb322d02244ed78a6e9840e109410a.png)
![](https://img.xkw.com/dksih/QBM/2015/8/13/1573896645001216/1573896651513856/STEM/137822fdfcf54d66957591199c4ce521.png)
![](https://img.xkw.com/dksih/QBM/2015/8/13/1573896645001216/1573896651513856/STEM/137822fdfcf54d66957591199c4ce521.png)
![](https://img.xkw.com/dksih/QBM/2015/8/13/1573896645001216/1573896651513856/STEM/0e63863b84144744a209cb1aa7020d9d.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
名校
【推荐1】问题背景:
(1)如图1,点
是
内一点,且
,连接
,
,求证:
.
(2)如图2,点
是线段
垂直平分线上位于
上方的一动点,
是位于
上方的等腰直角三角形,且
,则,
①
______1(填一个合适的不等号);
②
的最大值为______,此时
______°.
问题组合与迁移:
(3)如图3,
是等腰
底边
上的高,点
是
上的一动点,
位于
的上方,且
,若
,求
的最小值.
(1)如图1,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/809baaebe6216abd02a08a717c0f42a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a62ed98914013c253223f373f6526258.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/9/a86a1116-84cb-4b98-a728-3a0e3f97782c.png?resizew=177)
(2)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/08fa5b7ee3c02add5668fcdfd13e4b6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09c94ff4614059e5e91ed304b150d886.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/9/42923750-de20-4f95-a9db-e3d3ce8e1ace.png?resizew=201)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88779a6117022f95699f7885c334e3fc.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccc2f02416db8211128e18af2d13ecf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cca8cb29c69d89edf7d5f3749b90c86.png)
问题组合与迁移:
(3)如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f9596850884048064a3ec8bd48c4762.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f96aeb9125a16267b1b917f1ab9c6403.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2dd9a9b46dfbb5ebd087b390347b1fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccc2f02416db8211128e18af2d13ecf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/9/7f314b85-f93e-422b-a7a6-de4edf4ddfa0.png?resizew=147)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
【推荐2】如图,点A是直线y=kx(k>0)上一点,且在第一象限,点B,C分别是x,y正半轴上的点,且满足∠BAC=90°.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/7/0d9e8192-b2bd-4da9-99e9-bf21cfb795b5.png?resizew=475)
(1)如图1,当k=1时,求证:AB=AC;
(2)如图2,记∠AOB=α,
①根据所学,不难得到tanα= ,(用含k的式子表示);
②若k=
,求
的值;
(3)如图3,若k=
,连接BC,OA⊥BC,已知抛物线y=ax2+bx+c经过O,A,B三点,与直线BC相交于点B,D,连接OD,△OBD的面积为
,求抛物线的函数表达式.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/7/0d9e8192-b2bd-4da9-99e9-bf21cfb795b5.png?resizew=475)
(1)如图1,当k=1时,求证:AB=AC;
(2)如图2,记∠AOB=α,
①根据所学,不难得到tanα= ,(用含k的式子表示);
②若k=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33adb74906403b0b00fcbd9fa691d8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea79586df2029edb34c7cb2f67dc3722.png)
(3)如图3,若k=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a94f73667823e65f44bf1ddfde12046.png)
您最近一年使用:0次