如图,在
中,
,点D为
边的中点,以
为直径作
,分别与
、
交于点E、F,过点E作
于G.
是
的切线;
(2)若
,
的直径为5,求
的长.
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c13ab7f17263c4e6163d960f1c5060.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/959c7c2c0fb9b50aee821dd109df2157.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
更新时间:2024-04-25 11:34:32
|
相似题推荐
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,
内接于
,
平分
交
于
,过点
作
分别交
、
延长线于
、
,连接
.
(1)求证:
是
的切线;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4635b3ba280ea836f37948e70f039103.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/1/31112918-f79b-42e0-ac4c-964baf31d605.png?resizew=156)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cebae81fc24dd6a2a1926240de0812fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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解答题-证明题
|
适中
(0.65)
名校
【推荐2】如图,在矩形ABCD中,点O为边AB上一点,以点O为圆心,OA为半径的⊙O与对角线AC相交于点E,连接BE,
.
![](https://img.xkw.com/dksih/QBM/2022/1/17/2896490730536960/2896549947318272/STEM/f33d93d1-e629-469b-816e-4890772a7790.png?resizew=163)
(1)求证:BE为⊙O的切线;
(2)若当点E为AC的中点时,⊙O的半径为1,求矩形ABCD的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/226c231c1150e27c34eb787a46b02ea8.png)
![](https://img.xkw.com/dksih/QBM/2022/1/17/2896490730536960/2896549947318272/STEM/f33d93d1-e629-469b-816e-4890772a7790.png?resizew=163)
(1)求证:BE为⊙O的切线;
(2)若当点E为AC的中点时,⊙O的半径为1,求矩形ABCD的面积.
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解答题-证明题
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适中
(0.65)
【推荐1】已知:△ABC是等边三角形,点D在直线AB上运动(不与点A、点B重合),连接CD,将△ADC绕点D逆时针 旋转得到△FDE(点A的对应点为点F,点C的对应点为点E).
![](https://img.xkw.com/dksih/QBM/2022/5/27/2988381497532416/2990298907377664/STEM/c4499cae-cdaa-4003-b1bf-8a578cc87996.png?resizew=326)
(1)如图①,连接AE,当点D为线段AB的中点,且点E落在CA的延长线上时,求
的度数;
(2)如图②,当点D在线段AB上,且旋转角为120°时,求证:EF∥AB;
(3)当点D在直线AB上,且旋转角为120°时,连接BE,取线段BE的中点M,连接AM、DM,若线段
,直接写出 线段AM的长度.
![](https://img.xkw.com/dksih/QBM/2022/5/27/2988381497532416/2990298907377664/STEM/c4499cae-cdaa-4003-b1bf-8a578cc87996.png?resizew=326)
(1)如图①,连接AE,当点D为线段AB的中点,且点E落在CA的延长线上时,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/836ea820cf3732508cdd332ceb9395ce.png)
(2)如图②,当点D在线段AB上,且旋转角为120°时,求证:EF∥AB;
(3)当点D在直线AB上,且旋转角为120°时,连接BE,取线段BE的中点M,连接AM、DM,若线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74cc0fd6a627a9c610f1c0129c7ffd7e.png)
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【推荐2】如图,在△ABC中,AB=2
,AC=4,∠B=45°,求BC的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35361e76a7c85d1886728c8d0200b234.png)
![](https://img.xkw.com/dksih/QBM/2019/3/16/2161934583603200/2166762524975104/STEM/f334da111e02484ea10f780f85f6aaa8.png?resizew=160)
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