如图,等腰三角形
中,
,
.以
为直径作⊙O交
于点
,交
于点
,
,垂足为
,交
的延长线于点
.
(1)连接
,求证:
∽
;
(2)求
的长度;
(3)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d30f9b7a6123f13fa0793ead76dc651a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/761a77e11e1e45c2a8b2d34d22cf8e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/24/1a8e78dc-4cb8-4866-b372-50a2bb1e765e.png?resizew=298)
(1)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/441dec590b47adc3678a291a3ec89a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f70698b092aa883b2a2ccffb0544e190.png)
更新时间:2023-08-06 14:48:28
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,
,
是
上一点,
于点E,
的延长线交
的延长线于点
.
(1)求证:
是等腰三角形;
(2)若
,
,求
的长.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd657e48b15b9b54a55817e2c26b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/8d6444bc-2ed0-4027-8117-f19c7c9b5b26.png?resizew=102)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/441dec590b47adc3678a291a3ec89a4a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/998329f9cdb86f5d60d7d5d70fc3781e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a0268d04b9dea7629af27af9a0285a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】在
中,
,
,点D是平面内一点(不与点A,B,C重合),连接
,
,连接
.将
沿直线
翻折,得到
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/1b2b2d2c-cbc8-4bd1-ac96-8fa880796a1b.png?resizew=275)
(1)如图1,点D在
内部,
交
于点E,点F是
上一点,且
,连接
.
①求证:
;
②若
,
,求点G到直线
的距离;
(2)如图2,点D在
的内部,试探究
,
,
之间的数量关系并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dab67d1b4a722079cd03b7b0a0e89ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a20cb14fea4a7cad4b7775a3dd67df9.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bbd6f0a0412d0f43ce1f7c1d530e56e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/1b2b2d2c-cbc8-4bd1-ac96-8fa880796a1b.png?resizew=275)
(1)如图1,点D在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.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/cc382c4f315de17f293d3d273626ade2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb52cf9b7ee0ec74fee88dcc8815f2a.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/173273c9ce6cda3cef314fd624195a38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037b342a682cbd4241855a243da3c016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)如图2,点D在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,
是
的外接圆,直径
,
,
平分
交
于点E.在
的延长线上取一点F,使得
,连接
.
(1)证明:
是
的切线;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e01009f2f3a3476fd1efe90291083132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/13/a38c365c-fb14-4eaa-840b-d73b01cda1d2.png?resizew=150)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/114a2e56d9a32e3886fd517a85ede50d.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
真题
【推荐2】如图,
是
的直径,
是
上的两点,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aef3e6f737398b806ac544261cfab8c4.png)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1573517204185088/1573517377052672/STEM/65be531fbe774610acba34889c2d0629.png)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/627f23deffe3423bcaac0b54b77514bb.png)
(2)若
将四边形
分成面积相等的两个三角形,试确定四边形
的形状.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85dc18a16a5e136f2f2022d3cbed6776.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aef3e6f737398b806ac544261cfab8c4.png)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1573517204185088/1573517377052672/STEM/65be531fbe774610acba34889c2d0629.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/627f23deffe3423bcaac0b54b77514bb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dba76518a473722e04cfbac3a4333bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dba76518a473722e04cfbac3a4333bb.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐1】已知抛物线
与
轴交于
、
两点,与
轴交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/1/055faa8e-877e-4224-b9c0-1f5e2b30f2b1.png?resizew=213)
(1)求抛物线的表达式;
(2)点P在直线
下方的抛物线上,连接
交
于点
,过点
作
轴的垂线
,垂线
交
于点
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
垂线
,求证
;当
最大时,求点P的坐标及
的最大值;
(3)在(2)的条件下,在
上是否存在点
,使
是直角三角形,若存在,请直接写出点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33355c289aba446bc7c892934b9c5a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/323cf72ad438f1bcb37003ede7dd5237.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21df2ff21377374dae306ce5895a46db.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/1/055faa8e-877e-4224-b9c0-1f5e2b30f2b1.png?resizew=213)
(1)求抛物线的表达式;
(2)点P在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80672dda9430cb42b3136bcb1b67bbad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.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/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e719a13d708cba6a3298b08e8cb38ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29a6ce188523ed6ab24fa2bfa6e17fdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29a6ce188523ed6ab24fa2bfa6e17fdb.png)
(3)在(2)的条件下,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b506b0941433a6a5d5387d0ec95596ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,已知∠ACB=∠CBD=90°,AC=b,CB=a,当BD与a,b之间满足怎样的关系时,△ACB∽△CBD?
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/31/41a62a8e-8218-443a-a25e-feb7655fdc6d.png?resizew=234)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图,小明将一张矩形纸片ABCD沿CE折叠,点B恰好落在AD边上的点F处,若AB∶BC=4∶5.求sin∠DCF的值.
![](https://img.xkw.com/dksih/QBM/2019/1/23/2124999638704128/2136959295315968/STEM/188faf743bfa4eb7bbbdbd903e0dced7.png?resizew=96)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】在Rt△ABC中,∠C=90°,若sinA=
求cosA,sinB,tanB的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5756451881af4d6594c820652ebcc2a.png)
![](https://img.xkw.com/dksih/QBM/2019/3/7/2155240205533184/2156840560312320/STEM/8d27d6fb4aa74758bee70aee280cbc2c.png?resizew=85)
您最近一年使用:0次