如图,已知
的直径
,
与
相切于E点,过B点作
,垂足为C,连接
、
.
(1)求证:
;
(2)若
,求图中阴影部分的面积(结果可保留π与根号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/454328a8e75953fdb0835ce80d9566e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff24d05b5b9502c2be337f9be84fe4ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/4/1a1de48e-884b-4cff-a10c-baf15b710f2c.png?resizew=177)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eafaa53c04502ee12340c131397aa2e0.png)
更新时间:2023-05-17 06:32:02
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】图1是传统的手工推磨工具,根据它的原理设计了如图2所示的机械设备,磨盘半径
,用长为
的连杆将点Q与动力装置P相连(
大小可变),点P在轨道
上滑动,并带动磨盘绕点O转动,
,
.
(1)如图2,当
与
相切时,求
的长.
(2)在磨盘转动过程中,设
的最大值为
,最小值为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1963c33b342cc567c9eeaecd095a3947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db8006cd7f76aef014cea1e42f429184.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8470fee13903efec98790a9df6dd9553.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ac747fa7e033b09ab20370fd27d5be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d6e0e6101f496cfc9dfbdd881c72ab0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/6/5605b82a-15aa-4c04-8ae7-59c3bf48ed9f.png?resizew=376)
(1)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
(2)在磨盘转动过程中,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a38c43d922840f5f7693007beeb62b34.png)
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|
适中
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【推荐2】如图,
都为⊙O的切线,切点分别为
,且
.
(1)求
的周长;
(2)求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4765e4e19542b181213e617ab469d700.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/016e82617e4586c46e55b27cd604db1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c19f0fcacac715a1200770516d1e4a67.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/2/aaf7a092-28c9-4c71-974d-70e680b51315.png?resizew=192)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cff7399ecc698e2fb415147c96d0d03.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbee6d5731d6f4bb1e4f2ba3d89b7dc.png)
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解答题-作图题
|
适中
(0.65)
【推荐1】如图,
是
的直径,
是
的切线,
交
于点 C.
(1)用无刻度的直尺和圆规在边
上作点 D ,使
;(保留作图痕迹,不写作法)
(2)在 (1) 的条件下,若
,求阴影部分的面积.
![](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/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/30/4be84328-243b-470f-b808-7dfde0766977.png?resizew=169)
(1)用无刻度的直尺和圆规在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c76d517887fb7241cc80f55d22583e25.png)
(2)在 (1) 的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20dac81e3e2e1bdf45c10579ce830b71.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】如图,
是半圆O的直径,点A在半圆O上,点B为
的中点,连接
,
,
,
与
相交于点E,过点B作直线
,交
的延长线于点F.
(1)求证:
是
的切线;
(2)若
,
,求阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6f9353ca110c8b81561455b232dbc15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cac054e2d7025710736dfbd86706a7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/29/cdf332f8-6816-495c-9541-e955a311e1e8.png?resizew=188)
(1)求证:
![](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/5bb12d9cbf4d45e8efc4f53c41e2d932.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6166b9a5437671bcba31e17c375eb39.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
的直径
与
相切于点C,与
的延长线交于点D,连接
,点E在线段
上,过点E作
的垂线交
的延长线于点F,交
于点G.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/11/0c85bd7d-8cd6-4c3c-b05b-e547208cad0b.png?resizew=188)
(1)求证:
;
(2)若
,点E为
的中点,求
的长.
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/11/0c85bd7d-8cd6-4c3c-b05b-e547208cad0b.png?resizew=188)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9903048597dbfcda758adce402a46f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89faa5541dff755777e1f82e4d7960e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.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,D为⊙O上一点,点C在直径BA的延长线上,∠CDA=∠CBD.
(1)求证:CD是⊙O的切线;
(2)过点B作⊙O的切线交CD的延长线于点E,若BC=4,tan∠ABD=
,求BE的长.
(1)求证:CD是⊙O的切线;
(2)过点B作⊙O的切线交CD的延长线于点E,若BC=4,tan∠ABD=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/2020/2/24/2405723814928384/2406026367229952/STEM/035fc1a4230948dbb6c167d89fe3eb9d.png?resizew=169)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】已知:如图,
是
的直径,
切
于
,
交
于
,
为
边的中点,连结
.
(1)
是
的切线;
(2) 若
,
的半径为5, 求
的长.
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
(2) 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bfeaf26f178031f78a5545233a2a73f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://img.xkw.com/dksih/QBM/2011/10/17/1573266078113792/1573266212175872/STEM/9e982d8d95184fe392d1898e514e3da6.png)
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解答题-问答题
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适中
(0.65)
【推荐2】如图,Rt
中,∠C=90°,D是BC上一点,∠DAC=30°,BD=2,AB=
,求AC的长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/2/d528dae6-c04e-42e3-a137-963dddd804af.png?resizew=281)
您最近一年使用:0次