如图,在
中,
,
平分
交
于点E,点O在
上,经过点A,E的
分别交
于点D,F,连接
交
于点P.
(1)求证:
是
的切线;
(2)若
,求阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5dc62e10004e73908091338362917da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/28/685e7c62-f0c6-4420-ab8c-987141711e03.png?resizew=174)
(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/f46dc69ca35e2f82b665ed0c36f275c1.png)
更新时间:2023-05-15 06:12:41
|
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】如图,已知
是半圆
的直径,过线段
上一动点
,作
交半圆
于点
,连接
,过点
作
,垂足为点
,
的延长线交半圆
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/14/404c1b41-2989-45bf-a781-2957012e81a7.png?resizew=457)
(1)求证:
;
(2)若
,设
,
,求
关于
的函数关系式;
(3)如图2,若连接
并延长交
的延长线于点
,当
与
相似时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212ef540be5e4a07170d9476d03b07c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/14/404c1b41-2989-45bf-a781-2957012e81a7.png?resizew=457)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea5d76bddb56d3fe34a5a183b32695db.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c34eff4d793873d9e812d75d90fd10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/481731b514f1e10906993fa6b3cba38a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)如图2,若连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a477603f3f88c3b48352b6130f9ad5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74c6a5338354809d138830554d7cb2f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4da8c9541c01c2fa51788ed30cd6a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea485bd9ea9b8832027bc1b44578aee1.png)
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名校
【推荐2】如图,△ABC内接于⊙O,直径AD平分∠BAC,AD交BC于点K.
![](https://img.xkw.com/dksih/QBM/2022/4/24/2964937203769344/2967012690731008/STEM/aa3cb0af-5251-4663-9570-7f4fc25f93c3.png?resizew=511)
(1)如图1,求证:BK=CK;
(2)如图2,当AK=3DK时,求证:△ABC为等边三角形;
(3)如图3,在(2)的条件下,点E在弧AB上,连接AE、BE、CE,弦AF⊥AE,且AF=CE,连接DF,当DF=2时,求BE的长.
![](https://img.xkw.com/dksih/QBM/2022/4/24/2964937203769344/2967012690731008/STEM/aa3cb0af-5251-4663-9570-7f4fc25f93c3.png?resizew=511)
(1)如图1,求证:BK=CK;
(2)如图2,当AK=3DK时,求证:△ABC为等边三角形;
(3)如图3,在(2)的条件下,点E在弧AB上,连接AE、BE、CE,弦AF⊥AE,且AF=CE,连接DF,当DF=2时,求BE的长.
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【推荐1】如图,在四边形
中,连接
,作
的外接圆
交
于点
,连接
,交
于点
,
.
,求证:
是
的切线;
(2)若
,求
的半径;
(3)若
,
为
的中点,则
的长为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eeb0c8df3d8c5260768c5e407b3583a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dceb5cc71fc50f20649f6b9535fd914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b939af5ba06e279cce39396aaf0fae06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65ff13b4da65c7da3d898ba58e967b24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667349d99185bb045030b733352ff7fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
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解答题-问答题
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【推荐2】如图,AB是
的直径,弦
于点H.点G在
上,过点G作直线EF,交CD的延长线于点E,交AB的延长线于点F.连接AG交CD于点K,且
.
![](https://img.xkw.com/dksih/QBM/2022/4/24/2964935770267648/2966850873991168/STEM/5a05368c-9ad3-4976-9ef6-1c79af78b539.png?resizew=165)
(1)判断直线EF与
的位置关系,并说明理由;
(2)若AC//EF,
,
,求
的半径;
(3)在(2)的条件下,试求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18618947d98fbc38fc7518b36f6fec8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18618947d98fbc38fc7518b36f6fec8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f043617f803828881a6d152dde02d3.png)
![](https://img.xkw.com/dksih/QBM/2022/4/24/2964935770267648/2966850873991168/STEM/5a05368c-9ad3-4976-9ef6-1c79af78b539.png?resizew=165)
(1)判断直线EF与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18618947d98fbc38fc7518b36f6fec8d.png)
(2)若AC//EF,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/502c784373d1a7b37f78350d1b9618e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/704d2e96b81c8348d005447935318deb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18618947d98fbc38fc7518b36f6fec8d.png)
(3)在(2)的条件下,试求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/086a2d39af6a3ec5889ffa28bf068d41.png)
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【推荐1】如图,在
中,
,
,
,点
在
上,连接
,过点
作
的垂线交
于点
,连接
,
的外接圆交直线
于点
圆心为
.
![](https://img.xkw.com/dksih/QBM/2022/4/5/2951517403955200/2951659406368768/STEM/623276d1-e67b-4518-ac07-1f0a1ea9aeb1.png?resizew=252)
(1)若
平分
;
①判断
与
的位置关系,并说明理由;
②求出此时图中阴影部分的面积;
(2)若
,求
的直径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7281b641656a5992abaafb4190ca9afc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e268b5d48f1be920502f98a9b4c709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1370d4c0ca64eed76b7dbdcf48358215.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377f5c10cf527c87ab06bff61384f7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefe4a3e7a7fa195ed6a6712447639b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9be9f2c8cc327ec0032d04a3e788ff69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/2022/4/5/2951517403955200/2951659406368768/STEM/623276d1-e67b-4518-ac07-1f0a1ea9aeb1.png?resizew=252)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/146a63bac5ecd239f2696801e8eaa0b2.png)
①判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
②求出此时图中阴影部分的面积;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc4039f7b10f81573cb8ed7952a7bc51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
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【推荐2】如图,已知⊙C过菱形ABCD的三个顶点B,A,D,连结BD,过点A作AE
BD交射线CB于点E.
![](https://img.xkw.com/dksih/QBM/2022/3/9/2932746499391488/3058353038966784/STEM/65cac578d6df4c87a01ce849ef9eac15.png?resizew=226)
(1)求证:AE是⊙C的切线.
(2)若半径为2,求图中阴影部分的面积.
(3)在(2)的条件下,在⊙C上取点F,连结AF,使∠DAF=15°,求点F到直线AD的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://img.xkw.com/dksih/QBM/2022/3/9/2932746499391488/3058353038966784/STEM/65cac578d6df4c87a01ce849ef9eac15.png?resizew=226)
(1)求证:AE是⊙C的切线.
(2)若半径为2,求图中阴影部分的面积.
(3)在(2)的条件下,在⊙C上取点F,连结AF,使∠DAF=15°,求点F到直线AD的距离.
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真题
【推荐1】如图,CE是⊙O的直径,BD切⊙O于点D,DE∥BO,CE的延长线交BD于点A.
![](https://img.xkw.com/dksih/QBM/2015/8/5/1573892473987072/1573892479582208/STEM/a8fe84e68d7a4a7f8ddf50c7eeff07ae.png?resizew=123)
(1)求证:直线BC是⊙O的切线;
(2)若AE=2,tan∠DEO=
,求AO的长.
![](https://img.xkw.com/dksih/QBM/2015/8/5/1573892473987072/1573892479582208/STEM/a8fe84e68d7a4a7f8ddf50c7eeff07ae.png?resizew=123)
(1)求证:直线BC是⊙O的切线;
(2)若AE=2,tan∠DEO=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
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【推荐2】在菱形ABCD中,∠A=60°,AB=8cm,如图①,点E,H从点A开始向B,D运动,同时点F,G从点C向B,D运动,运动速度都为1cm/秒,运动时间为t秒(0≤t<8).
(1)当运动时间t=4时,求证:四边形EFGH为矩形;
(2)当t等于多少秒时,四边形EFGH面积是菱形ABCD面积的
;
(3)如图②,连接HF,BG,当t等于多少秒时,HF⊥BG.
(1)当运动时间t=4时,求证:四边形EFGH为矩形;
(2)当t等于多少秒时,四边形EFGH面积是菱形ABCD面积的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
(3)如图②,连接HF,BG,当t等于多少秒时,HF⊥BG.
![](https://img.xkw.com/dksih/QBM/2019/6/4/2218292544282624/2219792297181184/STEM/aee653623053467e93cc90c585a4c9d6.png?resizew=242)
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【推荐3】如图 1,直线 y=2x+2 分别交 x 轴、y 轴于点A、B,点C为x轴正半轴上的点,点 D从点C处出发,沿线段CB匀速运动至点 B 处停止,过点D作DE⊥BC,交x轴于点E,点 C′是点C关于直线DE的对称点,连接 EC′,若△ DEC′与△ BOC 的重叠部分面积为S,点D的运动时间为t(秒),S与 t 的函数图象如图 2 所示.
(1)VD ,C 坐标为 ;
(2)图2中,m= ,n= ,k= .
(3)求出S与t 之间的函数关系式(不必写自变量t的取值范围).
(1)VD ,C 坐标为 ;
(2)图2中,m= ,n= ,k= .
(3)求出S与t 之间的函数关系式(不必写自变量t的取值范围).
![](https://img.xkw.com/dksih/QBM/2020/2/1/2389474505359360/2389532663488512/STEM/de19c7e62fcd44e89106f542ff520143.png?resizew=424)
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