已知:菱形
和菱形
,
,起始位置点A在边
上,点B在
所在直线上,点B在点A的右侧,点
在点
的右侧,连接
和
,将菱形
以A为旋转中心逆时针旋转
角(
).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/15/edebadbe-3a48-41b0-b1f5-16619ed47073.png?resizew=462)
(1)如图1,若点A与
重合,且
,求证:
;
(2)若点A与
不重合,M是
上一点,当
时,连接
和
,
和
所在直线相交于点P;
①如图2,当
时,请求出线段
和线段
的数量关系及
的度数;
②如图3,当
时,请直接写出线段
和线段
的数量关系及
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d609847e2ff3d64e5a514582c3ead0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/788c65ceb0663512e37d68488c8dfc34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb0628cecbfc98d390e5447d52414e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb0628cecbfc98d390e5447d52414e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24cfad1ba71a78d8f415335cde2f8c52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e915c7310f3781887a1afb99dbf949.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/15/edebadbe-3a48-41b0-b1f5-16619ed47073.png?resizew=462)
(1)如图1,若点A与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34d2f1f75b87351d44723eedfc34a93a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d493dfab1d8677818b0faddb537e855.png)
(2)若点A与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24cfad1ba71a78d8f415335cde2f8c52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bfea16ad4071629991d3111589d16fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
①如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34d2f1f75b87351d44723eedfc34a93a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0433f8116768b42642a7f7e5977ce6.png)
②如图3,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cce6f6bf45488ced9895ed73f5e3c8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0433f8116768b42642a7f7e5977ce6.png)
更新时间:2023-12-15 18:04:21
|
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】如图(1),已知等边
,点D,E分别是边
,
上的点,且
,连接
,
交于点P.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/3978b11c-92b4-4a14-ab06-f0cc58b31192.png?resizew=321)
(1)求证:
;
(2)如图(2)连接
,若点P恰好落在以
为直径的圆上,求
的度数;
(3)在条件(2)下,求
的值.
![](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/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c8fb32ae05a9c1abd3374f5c5f7a999.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/3978b11c-92b4-4a14-ab06-f0cc58b31192.png?resizew=321)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2524a121b46f521cb7d86352ce169fef.png)
(2)如图(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2edbd1aa951458ec8c30393d52d7789f.png)
(3)在条件(2)下,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee940049ce6026ed32c01a8d0b29905.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】完成下列各题:
(1)问题情境 如图1,
和
都是等边三角形,连接
,
,求证:
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/f4043d75-1a5d-47c9-891b-b5bbcee12ea5.png?resizew=145)
(2)迁移应用 如图2,
和
都是等边三角形,A,B,E三点在同一条直线上,M是
的中点,N是
的中点,P在
上,
是等边三角形,求证:P是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/8535cc3c-bb7b-419b-bda7-482e5f3e0652.png?resizew=202)
(3)拓展创新 如图3,P是线段
的中点,
,在
的下方作等边
(P,F,H三点按逆时针顺序排列,
的大小和位置可以变化),连接
,
.当EF+BH的值最小时,直接写出等边
边长的最小值.
(1)问题情境 如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52273305805769a438772342b53c289e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/f4043d75-1a5d-47c9-891b-b5bbcee12ea5.png?resizew=145)
(2)迁移应用 如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/d23b488f961d9fde37feb7f5c497c0d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/8535cc3c-bb7b-419b-bda7-482e5f3e0652.png?resizew=202)
(3)拓展创新 如图3,P是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2816811954311a2792b3bfaa7aecf81f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21871e06601d895874b1b8a49b1b808f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21871e06601d895874b1b8a49b1b808f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21871e06601d895874b1b8a49b1b808f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/5b78f6c6-7ab4-44d6-8029-c5f534383398.png?resizew=175)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
解题方法
【推荐3】三角形的布洛卡点(Brocardpoint)是法国数学家和数学教育家克洛尔(A.LCrelle1780-1855)于1816年首次发现,但他的发现并未被当时的人们所注意.1875年,布洛卡点被一个数学爱好者法国军官布洛卡(Brocard1845-1922)重新发现,并用他的名字命名.如图1,若
内一点P满足
,则点P是
的布洛卡点,
是布洛卡角.
![](https://img.xkw.com/dksih/QBM/2021/5/20/2725305469157376/2741495660707840/STEM/87a2179f-c0c1-4c7c-a01f-019c98ad5d7f.png)
(1)如图2,点P为等边三角形ABC的布洛卡点,则布洛卡角的度数是______;PA、PB、PC的数量关系是______;
(2)如图3,点P为等腰直角三角形ABC(其中
)的布洛卡点,且
.
①请找出图中的一对相似三角形,并给出证明;
②若
的面积为
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa593f2444894b02e8d67c547087dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d8fd6c6c1deeeb45e15f639719e02.png)
![](https://img.xkw.com/dksih/QBM/2021/5/20/2725305469157376/2741495660707840/STEM/87a2179f-c0c1-4c7c-a01f-019c98ad5d7f.png)
(1)如图2,点P为等边三角形ABC的布洛卡点,则布洛卡角的度数是______;PA、PB、PC的数量关系是______;
(2)如图3,点P为等腰直角三角形ABC(其中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aa2da622fcdc28ee85c08c5b0a4e3af.png)
①请找出图中的一对相似三角形,并给出证明;
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533a7b702ada1dd80123e4041271d521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】综合探究
中,点D为
边上一动点,
交
于点E,将
绕点D顺时针旋转
,得到
,连接
.则
与
的数量关系是______;
的度数为______度.
(2)如图2,在
中,
,点D为
边上一动点;
交
于点E,当
时,求
的值.
(3)如图3,在等边
中,D是边
上一动点,连接
,将
绕点D顺时针旋转
,得到
,连接
.取
的中点F,连接
.若
,请直接写出线段
的长.
![](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/066cd386723885c535ea720f5817847a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/752fa646a2d9cfca34001748445301c9.png)
(2)如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64a640bacdc4f5500a68b8bb3caf7dbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/066cd386723885c535ea720f5817847a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c298c47449d1ef45df550963dc4d83b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6801c7dff835297ca268b455754e8d02.png)
(3)如图3,在等边
![](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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e61b8ad004ebef87d52dcccf80de978.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】如图,在
中,
,
,
.
(1)求BC边上的高线长;
(2)点E为线段AB的中点,点F在边AC上,连结EF,沿EF将
折叠得到
,连接PA、PE、PF.
①如图2,当
时,求AP的长;
②如图3,当点P落在BC上时,求证:
.
![](https://img.xkw.com/dksih/QBM/2021/1/25/2646078523695104/2659850741702656/STEM/a2d3b5b3-e20c-4fbb-b0a7-4b01696eda07.png)
![](https://img.xkw.com/dksih/QBM/2021/1/25/2646078523695104/2659850741702656/STEM/2daeb4eb-fdaf-4cfa-8550-01cd35da7bac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7099026716ee1821dd7d9f157dc055f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/998329f9cdb86f5d60d7d5d70fc3781e.png)
(1)求BC边上的高线长;
(2)点E为线段AB的中点,点F在边AC上,连结EF,沿EF将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b51d3992644d37dc71c9b5a97d515c.png)
①如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ca0940f5c21431c089d4f7a221df43c.png)
②如图3,当点P落在BC上时,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8945cd11b9a3203377cd111bd19a0d10.png)
![](https://img.xkw.com/dksih/QBM/2021/1/25/2646078523695104/2659850741702656/STEM/a2d3b5b3-e20c-4fbb-b0a7-4b01696eda07.png)
![](https://img.xkw.com/dksih/QBM/2021/1/25/2646078523695104/2659850741702656/STEM/2daeb4eb-fdaf-4cfa-8550-01cd35da7bac.png)
![](https://img.xkw.com/dksih/QBM/2021/1/25/2646078523695104/2659850741702656/STEM/6b16573d-c6fa-4178-ae83-4593df6f0c25.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】如图,在矩形ABCD中,E是BC上一点,连接AE,将矩形沿AE翻折,使点B落在CD边F处,连接AF,在AF上取一点O,以点O为圆心,OF为半径作⊙O与AD相切于点P.AB=6,BC=![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adbd3e8cf8325999cde03adf845d3dd0.png)
![](https://img.xkw.com/dksih/QBM/2020/1/14/2376972482379776/2377739295080448/STEM/9d8ab7aa4d964b80ba150d0d4e0cfbd0.png?resizew=139)
(1)求证:F是DC的中点.
(2)求证:AE=4CE.
(3)求图中阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adbd3e8cf8325999cde03adf845d3dd0.png)
![](https://img.xkw.com/dksih/QBM/2020/1/14/2376972482379776/2377739295080448/STEM/9d8ab7aa4d964b80ba150d0d4e0cfbd0.png?resizew=139)
(1)求证:F是DC的中点.
(2)求证:AE=4CE.
(3)求图中阴影部分的面积.
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】如图1所示,(1)在正三角形ABC中,M是BC边(不含端点B、C)上任意一点,P是BC延长线上一点,N是∠ACP的平分线上一点,若∠AMN=60°,求证:AM=MN.
(2)若将(1)中“正三角形ABC”改为“正方形ABCD”,N是∠DCP的平分线上一点,若∠AMN=90°,则AM=MN是否成立?若成立,请证明;若不成立,说明理由.
(3)若将(2)中的“正方形ABCD”改为“正n边形A1A2…An“,其它条件不变,请你猜想:当∠An﹣2MN= °时,结论An﹣2M=MN仍然成立.(不要求证明)
(2)若将(1)中“正三角形ABC”改为“正方形ABCD”,N是∠DCP的平分线上一点,若∠AMN=90°,则AM=MN是否成立?若成立,请证明;若不成立,说明理由.
(3)若将(2)中的“正方形ABCD”改为“正n边形A1A2…An“,其它条件不变,请你猜想:当∠An﹣2MN= °时,结论An﹣2M=MN仍然成立.(不要求证明)
![](https://img.xkw.com/dksih/QBM/2018/6/6/1961306430545920/1961884545572864/STEM/49ece1391b2d466686fd8b3783edb433.png?resizew=104)
![](https://img.xkw.com/dksih/QBM/2018/6/6/1961306430545920/1961884545572864/STEM/4a941bab522e43ac8a0a59aca84b0b3a.png?resizew=105)
![](https://img.xkw.com/dksih/QBM/2018/6/6/1961306430545920/1961884545572864/STEM/6c5081dbf3a9459289c2a30bdc2307d1.png?resizew=159)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】如图,在平面直角坐标系中,抛物线
与
轴的交点分别为
和
(点
在点
的左侧),与
轴交于点
,点
是直线
上方抛物线上一动点.
(1)求抛物线的解析式;
(2)如图
,过点
作
轴平行线交
于点
,过点
作
轴平行线交
轴于点
,求
的最大值及此时点
的坐标;
,设点
为抛物线对称轴上一动点,当点
,点
运动时,在坐标轴上确定点
,使四边形
为矩形,请直接写出所有符合条件的点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c9800e4b992044d16681e77ff6563c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852b303689c31189cd47bb4a3220f9fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83ebc472717d6ddeeeabeb6dff738a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(1)求抛物线的解析式;
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b82b02a6ebd5ac2b7ef373d296d2bde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3029ea5516e56e8d20594c71929624f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
解题方法
【推荐2】如图1,以AB为直径作⊙O,点C是直径AB上方半圆上的一点,连结AC,BC,过点C作∠ACB的平分线交⊙O于点D,过点D作AB的平行线交CB的延长线于点E.
![](https://img.xkw.com/dksih/QBM/2020/5/21/2467242279059456/2467460608614400/STEM/50cf92ef1d78497d944103a5e8de927c.png?resizew=368)
(1)如图1,连结AD,求证:∠ADC=∠DEC.
(2)若⊙O的半径为5,求CA•CE的最大值.
(3)如图2,连结AE,设tan∠ABC=x,tan∠AEC=y,
①求y关于x的函数解析式;
②若
=
,求y的值.
![](https://img.xkw.com/dksih/QBM/2020/5/21/2467242279059456/2467460608614400/STEM/50cf92ef1d78497d944103a5e8de927c.png?resizew=368)
(1)如图1,连结AD,求证:∠ADC=∠DEC.
(2)若⊙O的半径为5,求CA•CE的最大值.
(3)如图2,连结AE,设tan∠ABC=x,tan∠AEC=y,
①求y关于x的函数解析式;
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9437e56217aa06ee95147eda668216ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7294f5ae2a24ff42e84cd9773b2a7287.png)
您最近一年使用:0次