如图,
内接于⊙O,
平分
,且
.直线l过点C,
,垂足为F,
,垂足为G.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/2/69a3a89d-2d84-4693-89c7-11e1d919e79b.png?resizew=192)
(1)求证:直线l是⊙O的切线;
(2)若
,求图中阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9092c211baed1b2868f98db993542c3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284e282bb1d9fbf8634b3506ee5358ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61df3af35740b12c504ec1f2341cad03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c334350df9be155b169fc3784b08532b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/2/69a3a89d-2d84-4693-89c7-11e1d919e79b.png?resizew=192)
(1)求证:直线l是⊙O的切线;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24b3810b066f97807444d37ebc7a3be5.png)
2023·福建福州·模拟预测 查看更多[2]
更新时间:2023-03-31 12:07:22
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,
中,
,O为
边上一点,
经过点A,与
,
两边分别交于点E,F,连接
.
平分
,交
于点D,
经过点D.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/8/1b82e231-c2e4-4bc4-94d9-a8eb16fd1e97.png?resizew=178)
(1)求证:
是
的切线;
(2)若
,
的半径为5,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f76899b3a0bfbbdae7cb1148ad4bf018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/8/1b82e231-c2e4-4bc4-94d9-a8eb16fd1e97.png?resizew=178)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb6823a329628699619a39cde927510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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,
是
的直径,
为半径
的中点,过
作
交弦
于点
,交
于点
,且
.
(1)求证:
是
的切线;
(2)连接
,
,求
的度数;
(3)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/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7780a372cd82d48d8c7cfd8ae9ae944d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ca3dd37272f50d52d8deb2a62dd820.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/17/8f4fba81-75c2-4cd2-9150-269d3b62f428.png?resizew=155)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec88884321733714de9db5466629ccf2.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40ca1e91f0ccdcad461bf99744ea1ec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b47f81dd1fa2928195f938d9d6bf3e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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,以△ABC的边AB为直径的⊙O分别交BC、AC于F、G,且G是
的中点,过点G作DE⊥BC,垂足为E,交BA的延长线于点D
(1)求证:DE是的⊙O切线;
(2)若AB=6,BG=4,求BE的长;
(3)若AB=6,CE=1.2,请直接写出AD的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18c1c07115a06b6efc6f200d088b20fd.png)
(1)求证:DE是的⊙O切线;
(2)若AB=6,BG=4,求BE的长;
(3)若AB=6,CE=1.2,请直接写出AD的长.
![](https://img.xkw.com/dksih/QBM/2018/11/2/2066914162860032/2068287558664192/STEM/43a5d7faf79a41ef800b50919d0996fb.png?resizew=136)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】阅读与思考
如图是小宇同学的错题积累本的部分内容,请仔细阅读,并完成相应的任务.
任务:
(1)使用直尺和圆规,根据题目要求补全图形(不写作法,保留作图痕迹);
(2)求证:
与
相切于点D;
(3)若
,则劣弧
的长为_______.
如图是小宇同学的错题积累本的部分内容,请仔细阅读,并完成相应的任务.
×年×月×日星期日 错题积累 在 … ![]() 【自勉】 读书使人头脑充实,讨论使人明辨是非,做笔记则能使知识精确. ——培根 |
(1)使用直尺和圆规,根据题目要求补全图形(不写作法,保留作图痕迹);
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b62be9185f60115b704b391d5b9690d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/996510e24060cdfb0807865a575a22c5.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】图1为某型号汤碗,截面如图2所示,碗体部分为半圆,直径
为4英寸,碗底
与
平行,倒汤时碗底
与桌面
夹角为
,
(1)求
得长;
(2)求汤的横截面积(图3阴影部分).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/16/6e179ae2-2823-40a7-a13f-458464f055a1.png?resizew=418)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(2)求汤的横截面积(图3阴影部分).
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,⊙O的半径为2,△ABC是⊙O的内接三角形,AB=2
.
![](https://img.xkw.com/dksih/QBM/2021/1/12/2634649408446464/2634722955788288/STEM/443bf5ca7f2a4706a65c5c4ab035140c.png?resizew=126)
(1)求∠C的度数;
(2)求图中阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/2021/1/12/2634649408446464/2634722955788288/STEM/443bf5ca7f2a4706a65c5c4ab035140c.png?resizew=126)
(1)求∠C的度数;
(2)求图中阴影部分的面积.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图,△ABC内接于⊙O,且AB=AC,点D在⊙O上,AD⊥AB于点A,AD与BC交于点E,F在DA的延长线上,且AF=AE.
![](https://img.xkw.com/dksih/QBM/2015/6/26/1573855038169088/1573855044632576/STEM/b478b6c665694fb8a4dbd24d8f5752e9.png)
(1)试判断BF与⊙O的位置关系,并说明理由;
(2)若BF=5, cos∠C=
,求⊙O的直径;
(3)若cos∠F=
,则
.(直接填写结果)
![](https://img.xkw.com/dksih/QBM/2015/6/26/1573855038169088/1573855044632576/STEM/b478b6c665694fb8a4dbd24d8f5752e9.png)
(1)试判断BF与⊙O的位置关系,并说明理由;
(2)若BF=5, cos∠C=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7294f5ae2a24ff42e84cd9773b2a7287.png)
(3)若cos∠F=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb025431e160442cdd72e8a33249a9a8.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
真题
【推荐2】如图,
为⊙
的直径,
为⊙O上一点,
和过点
的切线互相垂直,垂足为
.
(1)求证:
平分
;
(2)若
,
,求:边
及
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/402d060d5901df2978b7d7d74424199c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ee826937d2add7a93aaa1422f8b736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a6a120e3b20e64e20753720f686529a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/6c0f4f9e-317b-4cb4-8869-cf6ebaf5e0f9.png?resizew=166)
您最近一年使用:0次