如图,
为半圆
的直径,
,过
作
的垂线
,点
为直线
上一点,连接
交半圆
于点
,以
为圆心,
为半径作圆弧交
于点
(
不与
重合).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/5ca0632b-4bcb-4d3e-ad05-ab53a6904673.png?resizew=536)
(1)如图2,连接
、
交于点
,若
为
重心时,求
的值;
(2)如图2,设
,
,求
关于
的函数关系式,并写出定义域;
(3)延长
交
于点
,延长
交射线
于点
,
①设
与线段
交于点
,连接
,
的度数是否发生变化,若不变,请求出度数;若变化,请至少给出两种不同情况下所对应的度数;
②若
与
相似,求
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/8b3a593f7126c0f4629df5ae20c5500a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/5ca0632b-4bcb-4d3e-ad05-ab53a6904673.png?resizew=536)
(1)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e107ffeef6779a978aca01cf36512767.png)
(2)如图2,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c55bda5be4caa88c24327f5cb964a451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9d3ef6ee219fd994504cc1a5f0eef1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f986c181183d8e7e45655e6c5b5d5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecff6005f926665a926c07ad62e0f032.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
①设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6f6558fef858bf27e9811c2d9426fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50a111d53f28126c3ecd5f18b13770de.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a4a56eb2918d8051b176c4363a3fc87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
更新时间:2022-10-24 10:17:52
|
相似题推荐
解答题-证明题
|
困难
(0.15)
【推荐1】如图,在平面直角坐标系中,点O为坐标原点,点A的坐标为(﹣3,0),点B的坐标为(2,0).在y轴正半轴上有一动点C,△ABC的外接圆与y轴的另一交点为D.过点A作直线BC的垂线,垂足为E,直线AE交y轴于点F.
(1)求证:OF=OD
(2)随着点C的运动,当∠ACB是钝角时,是否存在CO=CE的情形?若存在,试求OD的长;若不存在,请说明理由.
(3)将点B绕点F顺时针旋转90°得到点G,在点C的整个运动过程中.
①当点G恰好落在△ABC的边AC或边BC所在直线上时,求满足条件的点C坐标.
②当CG∥AB时,则△ABC的面积是 (直接写出结果)
(1)求证:OF=OD
(2)随着点C的运动,当∠ACB是钝角时,是否存在CO=CE的情形?若存在,试求OD的长;若不存在,请说明理由.
(3)将点B绕点F顺时针旋转90°得到点G,在点C的整个运动过程中.
①当点G恰好落在△ABC的边AC或边BC所在直线上时,求满足条件的点C坐标.
②当CG∥AB时,则△ABC的面积是 (直接写出结果)
![](https://img.xkw.com/dksih/QBM/2019/5/23/2209696214335488/2212446070841344/STEM/9c1223937f7e4df8a1e6ced521713ea4.png?resizew=143)
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解答题-证明题
|
困难
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名校
【推荐2】如图1,已知点
在四边形
的边
上,且
,
平分
,与
交于点G,
分别与
、
交于点E、F.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/20/0a8e0c16-48b4-4673-8486-fda8df63e84f.png?resizew=342)
(1)求证:
;
(2)如图2,若
,求
的值;
(3)当四边形
的周长取最大值时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62fefe7ba6dde1341c5b4b0c9b8e1b26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc9f91270ddbe1cf3c1362e1b95aee14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/20/0a8e0c16-48b4-4673-8486-fda8df63e84f.png?resizew=342)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33284305d4a0b42f850e19202bfe9eb1.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7faabc484ce3666706c1beffda4bcfe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5ca1cff7e12ceae15df29736638545a.png)
(3)当四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810f9b4c1535bf75de1e31c164ccfe1e.png)
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解答题-作图题
|
困难
(0.15)
名校
解题方法
【推荐1】如图,一张半径为
的圆形纸片,点
为圆心,将该圆形纸片沿直线
折叠,直线
交
于
两点.
(1)若折叠后的圆弧恰好经过点
,利用直尺和圆规在图中作出满足条件的一条直线
(不写作法,保留作图痕迹),并求此时线段
的长度.
(2)已知
是
一点,
.
①若折叠后的圆弧经过点
,则线段
长度的取值范围是________.
②若折叠后的圆弧与直线
相切于点
,则线段
的长度为_________
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/976260cbf5e30856d4fd37a4b0a671a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/8/92d6c3b9-4d79-4027-ae23-2731b4f27363.png?resizew=254)
(1)若折叠后的圆弧恰好经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5518da069f954e0be18aeffe052c1c37.png)
①若折叠后的圆弧经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
②若折叠后的圆弧与直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
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解答题-问答题
|
困难
(0.15)
名校
【推荐2】(1)如图1,在边长为6的等边
中,点D为
边上一点,且
.若
边上存在一点E,使得线段
将
分成面积相等的两部分,求
的长度.
(2)如图2,某城市开发区有一块空地,
为一条长
的道路,
为一条长
的道路,且
.现在为了优化居住环境,开发区政府计划进一步开发利用这块空地,根据美观性、实用性等设计要求,
,同时计划过
中点M设置一个入口,修建一条笔直的观景大道
(点N在线段
上).请问是否存在符合设计要求的线段
,使得观景大道
将四边形
的面积分成相等的两部分且四边形
的面积最大.若存在,请计算
的长度;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(2)如图2,某城市开发区有一块空地,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4a354a1ee093d6e0e5e7ff7b27188d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95d24d904cbb6eeccd22955ed83b08dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0ce06dbe9e1177468781ba4aff85ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b0382c28547d3834ca71f3f0677695.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1fbd6d40dc152a39905d3ed13420a22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
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解答题-证明题
|
困难
(0.15)
名校
【推荐1】已知:⊙O是△ABC的外接圆,连接BO并延长交AC于点D,∠CDB=3∠ABD.
![](https://img.xkw.com/dksih/QBM/2022/2/14/2916009872244736/2930445495181312/STEM/4f86d3424eb74b7db420fe195b447334.png?resizew=551)
(1)如图1,求证:AC=AB;
(2)如图2,点E是弧AB上一点,连接CE,AF⊥CE于点F,且∠BAF=∠ACE,求tan∠BCE的值;
(3)如图3,在(2)的条件下,延长BD交⊙O于点H,连接FH,若EF=2,BC=8
,求线段FH的长.
![](https://img.xkw.com/dksih/QBM/2022/2/14/2916009872244736/2930445495181312/STEM/4f86d3424eb74b7db420fe195b447334.png?resizew=551)
(1)如图1,求证:AC=AB;
(2)如图2,点E是弧AB上一点,连接CE,AF⊥CE于点F,且∠BAF=∠ACE,求tan∠BCE的值;
(3)如图3,在(2)的条件下,延长BD交⊙O于点H,连接FH,若EF=2,BC=8
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
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解答题-证明题
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困难
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名校
【推荐2】如图,
中,
为直角,点
为
边上一动点(不与
,
重合),以
为直径作
,
与
交于点
,过点
作
交
的延长线于点
,
与
交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/18/74b41339-8e12-4811-8abd-60193671a8e8.png?resizew=218)
(1)求证:
;
(2)如果
,求证:
;
(3)如果
,
,
①令
,
,求y关于x的函数关系式;
②若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/d8225b3e02f5a9f1fd5a09ada650cb78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/18/74b41339-8e12-4811-8abd-60193671a8e8.png?resizew=218)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39e999c184e8cf8f5b30cf3be87eb137.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11f939eb3100dab482b5492312b601f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a87efa1454c6082c9168c66b5a129f3.png)
(3)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
①令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8711eddf26d11fc974dfb6da4b640918.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/531944b051cb8e0714370f050c5633f0.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb5182ffca05f20d3118fa3e28575c44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d3c24c0a11fa3e09841f884ba666043.png)
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