在
中,
,以
为直径的
分别与
交于点
,过点
作
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/25/11b9bc2c-4188-4add-9963-ce6d8d9e6b0e.png?resizew=293)
(1)求证:
是
的切线;
(2)如图1,若
的半径为
,求阴影部分的面积;
(3)如图2,若
,求
的值.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/887721a843b2dc8e947cc42d09868e33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a51949f48ee8cf746851ba779b078e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/761a77e11e1e45c2a8b2d34d22cf8e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/25/11b9bc2c-4188-4add-9963-ce6d8d9e6b0e.png?resizew=293)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5df79131540626fd835a1fc6ddc9580c.png)
(3)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da68330f025262b33ab806e48ab5c381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
更新时间:2023-12-25 18:51:30
|
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解答题-问答题
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适中
(0.65)
【推荐1】如图,在矩形
中,
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.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d649afbddd907f0dfec1420f02f82fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2998ab763026296c102fafd8e9de0fbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.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,在
中,
,
,
,
的垂直平分线与
交于点D,与
交于点E,连接
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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解答题-证明题
|
适中
(0.65)
【推荐1】如图,
与
的BC边相切于点B,与AC、AB边分别交于点D、E,
,EB是
的直径.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/24/21e6ffb8-2abf-489a-aff3-f4e41498d30f.png?resizew=123)
(1)求证:AC是
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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(1)求证:AC是
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(2)若
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您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,在
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.
是
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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(2)求
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您最近一年使用:0次
解答题-证明题
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适中
(0.65)
【推荐1】如图,AB与⊙O相切于点C,OA、OB分别交⊙O于点D、E、弧CD=弧CE
(1)求证:∠A=∠B.
(2)已知AC=2
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(1)求证:∠A=∠B.
(2)已知AC=2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/2020/2/15/2399663449079808/2400853167456256/STEM/4f86ec3ed7fb4e08ad36732bced0f1e7.png?resizew=175)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,半径是3的
中,
与
相切于点
,
与
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上的一点,
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是
的切线;
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/26/d31f4b33-331e-49a4-a6b7-bf6409926ac9.png?resizew=179)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b871a762469393cdd22f15aa49ebb8f9.png)
(2)求证:
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(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
|
适中
(0.65)
【推荐1】已知:在
中,点
在
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及
分别交于点
、
.
如图,当
时,求证:
;
如图,当
时,猜想:
与
之间是否存在着一定的数量关系?若存在,请写出它们之间的关系式,并给出证明过程;若不存在,请说明理由.
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您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,
,
,
,点
、
分别在
、
上,且
,设
到
、
的距离为
、
,则有:
![](https://img.xkw.com/dksih/QBM/2019/12/13/2354132002430976/2354210651521024/STEM/7cae7a37756242d29a6537ca1405b473.png?resizew=114)
(1)当
时,有
;当
时,有
;
当
时,有
;当
时,有
;
当
时,有
;当
时,有
;
(1)当
时,有
______;当
时,有
______;(
,
均为正整数)
(2)猜想当
时,有
______,并证明你的猜想.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37591109b0a0ec5ffe2133f83310eca.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edf900c810371fb21297c15f86d8743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31ac1def558351e2e3ed1235c570530.png)
![](https://img.xkw.com/dksih/QBM/2019/12/13/2354132002430976/2354210651521024/STEM/7cae7a37756242d29a6537ca1405b473.png?resizew=114)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a5ec0292513c93ef3701d20bbc4bc08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8726a8e6b1fe48238a393d9b4feafbb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67b46acffebb6401dcfacd6e41f4718f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c250b3948c76c4b195dd1ea3943dddad.png)
当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b34bc38e5d446be0f8b6fd1e716aa760.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/208a871804c28305f2960eb9cb5d4e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/571285700b47d94e2ea06f66cadfafbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62f67d8edcf73563bef7c4974cdc5507.png)
当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11424561b687f1c348fce2c0d4551274.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60c2df297bc99d2bf7fcf7e92913adea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80b3ea6442b0422fbc863ed1b26cbf9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdd4a3b760b49abd63aac8e5482ad5d6.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5e5ee6b1d6af2044dbdc81b4895be6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a71a9d21f77e9535de152bb33f802bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04282f61bde62e6dd91bab9bb593a014.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a71a9d21f77e9535de152bb33f802bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(2)猜想当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b39096d255398f9c113d4917972839a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a71a9d21f77e9535de152bb33f802bb.png)
您最近一年使用:0次