题型:解答题-证明题
难度:0.65
引用次数:244
题号:18486227
如图,四边形
内接于
,
是
的直径,
,垂足为E,
平分
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/24/720096eb-6734-43d7-b6e6-3680d7414d57.png?resizew=175)
(1)求证:
是
的切线;
(2)若
,
,求
和弧
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4611ceb2a28f7a7e4d24266d7f99b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d3e081637bcea5368cc72370bae283b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/24/720096eb-6734-43d7-b6e6-3680d7414d57.png?resizew=175)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47df81c9885b86ec540f5c2543524751.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf943d918052790ca23a3062d3829ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
更新时间:2023-03-23 22:42:33
|
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解答题-问答题
|
适中
(0.65)
【推荐1】如图,
,
分别是
边
,
上的点,
,点
在
的延长线上,且
.
![](https://img.xkw.com/dksih/QBM/2019/9/27/2299806077747200/2299842202378240/STEM/aee6f5b7862743c692e820ac91f5bf7d.png?resizew=141)
(1)试判断
与
的位置美系,并说明理由.
(2)若
比
大
.求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb73f854e7561c943b460e6c84e26fb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92e06268afbd3701864038813c3e44be.png)
![](https://img.xkw.com/dksih/QBM/2019/9/27/2299806077747200/2299842202378240/STEM/aee6f5b7862743c692e820ac91f5bf7d.png?resizew=141)
(1)试判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/752fa646a2d9cfca34001748445301c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d3e081637bcea5368cc72370bae283b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d36581140ebac5d28438ea63b1b23b65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d3e081637bcea5368cc72370bae283b.png)
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适中
(0.65)
【推荐2】如图,已知
,
,点
是射线
上一动点(与点
不重合),
分别平分
和
,分别交射线
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/28/fe14dabf-c9c2-46ad-8a65-48fb7a3c80d7.png?resizew=168)
(1)
;
;
(2)当点
运动到某处时,
,求此时
的度数.
(3)当点
运动时,
:
的比值是否随之变化?若不变,请求出这个比值;若变化,请找出变化规律;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b005a1cc476fcdf602b7437ae38cd109.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a8793053fbb2ac5a3122b092a575124.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7225a9506d1d92ec465c2a84d7fd0540.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d9cc98e6df306063e645044f0faa7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fed9a763c7c81004fde8f4f9693d2f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a5b099b9112ed6a9f71b4a65875ccf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/28/fe14dabf-c9c2-46ad-8a65-48fb7a3c80d7.png?resizew=168)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96edd64e83c949d80ef897cc82e15fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38f61765b5f57a3208af1371e08b72c9.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56da880ea1c9760023f70fd0ede58a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
(3)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/868ff1350bd72625328c85c3097cd85e.png)
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名校
【推荐1】如图,AB是⊙O的直径,CD切⊙O于点D,且BD∥OC,连接AC.
(1)求证:AC是⊙O的切线;
(2)若AB=OC=4,求图中阴影部分的面积(结果保留根号和π)
(1)求证:AC是⊙O的切线;
(2)若AB=OC=4,求图中阴影部分的面积(结果保留根号和π)
![](https://img.xkw.com/dksih/QBM/2019/3/16/2161934583603200/null/STEM/e509b49d0ebf477481de792159454b8b.png?resizew=128)
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2】如图,为
的直径,点A在
的延长线上,点B在
上,过点C作直线
的垂线
,垂足为E,并且
.
(1)判断直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/223c5aa55d8eea3e61833f29d3cbc28f.png)
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解答题-问答题
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适中
(0.65)
【推荐1】如图1和图2,
为内、外两个圆的圆心,大圆被八等分,分点为
,
,
,
,
,
,
,
.已知两个圆的半径分别为
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/2/f76222b5-c4a2-4757-bc61-7dd27f102ea3.png?resizew=334)
(1)如图1,若大圆中的弦
与小圆相切于点
,求
的长;
(2)通过计算比较弧
的长和小圆的周长的大小;
(3)如图2,连接
,
,通过说理判断
和
的位置关系,并求点
到
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/2/f76222b5-c4a2-4757-bc61-7dd27f102ea3.png?resizew=334)
(1)如图1,若大圆中的弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80672dda9430cb42b3136bcb1b67bbad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80672dda9430cb42b3136bcb1b67bbad.png)
(2)通过计算比较弧
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
(3)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d62e8aadaadebf1454fde21a390ebdea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db7ea03277f8408fabe5b327cc34838f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d62e8aadaadebf1454fde21a390ebdea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db7ea03277f8408fabe5b327cc34838f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db7ea03277f8408fabe5b327cc34838f.png)
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解答题-证明题
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适中
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【推荐2】如图,在正方形
中,
, 以点C 为圆心,1为半径作圆,交
于点E,P 是
上的任意一点,将点P 绕点D 顺时针方向旋转
,得到点Q,连接
,
.
,求证:
;
(2)当
与
相切于正方形外部时,求线段
被
所截弦的长;
(3)当
时,求劣弧
的长度 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9272e29b54f6c317e8f18c6a5db75ecb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/397ca3104aa79c79c13cf849466d0d9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/781abb9ec469ff5d6171005319883240.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034c51d9c7ef3f0066655e97f964bd26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/669e8dfb2b45e6f74d86408343a18fe2.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaa74ac865013831301fddde1669687a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802e610390284f68601ec10074bb4420.png)
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解答题-证明题
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适中
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【推荐1】如图,在△ABC中,
,以AB为直径的
分别交AC,BC于点D,E,过B点的圆的切线交AC的延长线于点F.
![](https://img.xkw.com/dksih/QBM/2022/4/29/2968769615642624/2969226910433280/STEM/01d9ce37-2714-4996-b198-b7dcb18e3d8c.png?resizew=167)
(1)求证:∠FBC=
∠BAC;
(2)若
,AD=6,求
的半径的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/2022/4/29/2968769615642624/2969226910433280/STEM/01d9ce37-2714-4996-b198-b7dcb18e3d8c.png?resizew=167)
(1)求证:∠FBC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c137548c51a78eb5f21aa03d04516802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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解答题-问答题
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(0.65)
【推荐2】在∠ABC中,∠ABC=90°,tan∠BAC=
.
(1)如图1,分别过A、C两点作经过点B的直线的垂线,垂足分别为M、N,若点B恰好是线段MN的中点,求tan∠BAM的值;
(2)如图2,P是边BC延长线上一点,∠APB=∠BAC,求tan∠PAC的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)如图1,分别过A、C两点作经过点B的直线的垂线,垂足分别为M、N,若点B恰好是线段MN的中点,求tan∠BAM的值;
(2)如图2,P是边BC延长线上一点,∠APB=∠BAC,求tan∠PAC的值.
![](https://img.xkw.com/dksih/QBM/2019/5/21/2208295373815808/2208643615490048/STEM/ebbef60009e44fd980ff38deaf34535f.png?resizew=302)
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