如图,
是
的直径,点
,
在
上,
,
与
相交于点
,点
在
的延长线上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/22/9a19df9d-fe17-4c28-994c-8ce5661b9446.png?resizew=129)
(1)求证:
是
的切线;
(2)若
,
,求
的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212bfbd5575772ca36d6fc3e7b246e49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac3d3b55561ec5d4acc242ecd1c7f41.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/22/9a19df9d-fe17-4c28-994c-8ce5661b9446.png?resizew=129)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec67259153551e67bb3e035d11dc9334.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9938f4e86299b789840a58159eb9527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
更新时间:2023-03-21 19:47:46
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图,在
中,∠ACB=90°,AC=BC,P是
内一点,且PB=1,PC=2,PA=3,过点C作CD⊥CP,垂足为C,令CD=CP,连接DP,BD,求∠BPC的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/2022/7/4/3015420106203136/3023049224724480/EXPLANATION/d4ea636b9c024106973027902dd9886c.png?resizew=287)
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【推荐2】如图是一次函数
的图像.
![](https://img.xkw.com/dksih/QBM/2020/3/21/2424318978670592/2424355377307648/STEM/7c3bd513c02f49c2beec8d5671caef4a.png?resizew=158)
(1)设它的图像与
轴
轴分别交于
、
两点,求
的长;
(2)求
的面积;
(3)求点
到直线
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c6b28d3832f748441f80e9880bfa656.png)
![](https://img.xkw.com/dksih/QBM/2020/3/21/2424318978670592/2424355377307648/STEM/7c3bd513c02f49c2beec8d5671caef4a.png?resizew=158)
(1)设它的图像与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd2981bf2261343f905ec1b5355a3c4.png)
(3)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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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)
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解答题-证明题
|
适中
(0.65)
【推荐2】如图,AB为⊙O的直径,△ABC的边AC,BC分别与⊙O交于D,E,若E为
的中点.
(1)求证:DE=EC;
(2)若DC=2,BC=6,求⊙O的半径
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd6ffb78dad3375efa3b08ab518553d.png)
(1)求证:DE=EC;
(2)若DC=2,BC=6,求⊙O的半径
![](https://img.xkw.com/dksih/QBM/2018/12/30/2107936525918208/2108866198863872/STEM/4e8a7f824b26420998df09dae34c1ed2.png?resizew=162)
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解答题-作图题
|
适中
(0.65)
【推荐1】已知:如图,在
中,
.求作:
,使圆心O在斜边
上,经过点B且与边
相切于点E.(用直尺、圆规作图,不写作法,但要保留作图痕迹.)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,AB为⊙O的直径,PD切⊙O于点C,与BA的延长线交于点D,DE⊥PO交PO延长线于点E,连接PB,∠EDB=∠EPB.
(1)求证:PB是⊙O的切线.
(2)若PB=3,DB=4,求DE的长.
(1)求证:PB是⊙O的切线.
(2)若PB=3,DB=4,求DE的长.
![](https://img.xkw.com/dksih/QBM/2018/12/3/2089033187565568/2095408159662080/STEM/e766f8be7909403894551365590ddf6c.png?resizew=179)
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解答题-证明题
|
适中
(0.65)
【推荐1】如图,
是
的直径,C,D是
上的两点,且
,
交
于点E,点F在
的延长线上,
.
是
的切线;
(2)若
,
.
①求
的长;
②求
的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4009aa13093cc3865dcd51b371892160.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d96a5d40d0aea9f4398ca4d0fe9b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec67259153551e67bb3e035d11dc9334.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34d82a319b07fc4c8d3031310110f7a4.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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解答题-问答题
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【推荐2】如图1是小区常见的漫步机,当人踩在踏板上,握住扶手,像走路一样抬腿,就会带动踏板连杆绕轴旋转.如图2,从侧面看,踏板静止DE上的线段AB重合,测得BE长为0.21m,当踏板连杆绕着A旋转到AC处时,测得∠CAB=42°,点C到地面的距离CF长为0.52m,当踏板连杆绕着点A旋转到AG处∠GAB=30°时,求点G距离地面的高度GH的长.(精确到0.1m,参考数据:sin42°≈0.67,cos42°≈0.74,tan42°≈0.90,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/460317e7c26f95b9b29cfe1a89b796d6.png)
![](https://img.xkw.com/dksih/QBM/2019/5/30/2214680257150976/2216090371194880/STEM/83ebe361bf7e4d1ab86b0ded48bc073b.png?resizew=241)
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解答题-问答题
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适中
(0.65)
【推荐3】【问题初探】
(1)如图1,
中,
,
,点E在线段
上,
,垂足为点D,连接
,
,求证:
;
①如图2,丽丽从条件出发,发现
,利用条件
,结合“边角边”定理在
边上截取
,构造了一对全等三角形,将求证的问题转化为
与
的数量关系.
②如图3,东东受到丽丽的启发,也利用“边角边”定理,在
的延长线上取点F,使
,连接
,得到了
,发现
,利用边角之间的关系证明了问题.
请你选择一名同学的解题思路,写出解答过程,也可以用不同于上面两位同学的方法进行解答.
【迁移应用】
(2)如图4,在
中,
,
,点E在线段
上,过点B作
,交
的延长线于点D,线段
绕点D逆时针旋转
得到线段
,当点F恰好在
的延长线时,求证:
.
(3)在(2)的条件下,若
,请直接写出
的面积.
(1)如图1,
![](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/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84be64d28b1623e71ad989f37336b1f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a58a622e2b1a239f2f96aa1501e9799.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d04078295d5c09e8ecc2a04e79bce10.png)
①如图2,丽丽从条件出发,发现
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddf943d02e9821528dcea1ced232b330.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd8e8b8dc232a88228f377b7782db172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
②如图3,东东受到丽丽的启发,也利用“边角边”定理,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c280fc03fdbcf37491a8573850a1df95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/419340dfc39f89f50c13c2e035195b73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f0533597752a0efee17b335e548a72.png)
请你选择一名同学的解题思路,写出解答过程,也可以用不同于上面两位同学的方法进行解答.
【迁移应用】
(2)如图4,在
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b455b110a30c1533d0a0657e0e48ac33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc15e942a52c97cb7cff147db8b57d97.png)
(3)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f2281cb6df0c3c518ce5ed19a02b57e.png)
您最近一年使用:0次