名校
1 . 如图,AB为⊙O的直径,C是⊙O上一点,过点C的直线交AB的延长线于点D,AE⊥DC,垂足为E,F是AE与⊙O的交点,AC平分∠BAE.
(1)求证:DE是⊙O的切线;
(2)若AE=8,∠D=30°,求图中阴影部分的面积.
(1)求证:DE是⊙O的切线;
(2)若AE=8,∠D=30°,求图中阴影部分的面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/23/251c6438-c3bf-4979-9f84-66f70d8dbbde.png?resizew=162)
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2 . 如图,以
为直径,点
为圆心的半圆上有一点
且
点
为
上一点.将
沿直线
对折得到
点
的对应点为
且
与半圆相切于点
连接
交半圆于点
.
![](https://img.xkw.com/dksih/QBM/2020/11/5/2586490686365696/2588389155192832/STEM/259cf5bc-b529-4082-b7ec-51d02186f485.png?resizew=130)
(1)求证:
;
(2)当
时,求图中阴影部分面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/152236216f8d1cb39b261108e8fc8b9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44f7606459554b3a362dd12f9f7faec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe9873beba7041373f1bb02c541f08bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0005e1ef60f6ddc5f9a83e3de1ef3b2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41884b8495a39a961487bbc8b465e432.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e29dd5878a6163417d9dc7589ff036.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/195b7c84e9dadefbc35d674288314535.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44f7606459554b3a362dd12f9f7faec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd8c770e771283520181168fa89737df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2020/11/5/2586490686365696/2588389155192832/STEM/259cf5bc-b529-4082-b7ec-51d02186f485.png?resizew=130)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3a72b92825e66ab32338a7429f3acd3.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
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2020-11-08更新
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4卷引用:山西省2019年中考模拟百校联考数学试题(三)
山西省2019年中考模拟百校联考数学试题(三)2020年山西省临汾市尧都区九年级中考第三次大联考数学试题(已下线)【万唯原创】2020年山西-面对面正文-第一部分 夯实基础第六章3(已下线)专题13.2 圆(2)-备战2021年中考数学精选考点专项突破题集(全国通用)
解题方法
3 . 如图,四边形ABCD中,AB∥CD,AE⊥CD于E,∠ABC的平分线交AE于点O,以点O为圆心,OA为半径的圆经过点D,交CD于点F.
![](https://img.xkw.com/dksih/QBM/2020/8/5/2521270827507712/2524227117514752/STEM/4a971ee2be7d4a698d698d9feb402b8d.png?resizew=180)
(1)求证:BC与⊙O相切;
(2)若OB∥AD,DF=6,ME=
,求OB的长度及阴影部分的面积.(结果保留π)
![](https://img.xkw.com/dksih/QBM/2020/8/5/2521270827507712/2524227117514752/STEM/4a971ee2be7d4a698d698d9feb402b8d.png?resizew=180)
(1)求证:BC与⊙O相切;
(2)若OB∥AD,DF=6,ME=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
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2020-08-09更新
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2卷引用:2020年内蒙古鄂尔多斯市东胜区九年级初中毕业升学二模数学试题
真题
4 . 已知
的半径为
,
的半径为
,以
为圆心,以
的长为半径画弧,再以线段
的中点P为圆心,以
的长为半径画弧,两弧交于点A,连接
,
,
交
于点B,过点B作
的平行线
交
于点C.
![](https://img.xkw.com/dksih/QBM/2020/7/17/2507745673494528/2507780681883648/STEM/ec4a59f9e7d945e9b0d7fc25eda52607.png?resizew=307)
(1)求证:
是
的切线;
(2)若
,
,
,求阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0385df6c7f8ee7ab503b6ed35933695b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2858005b9ae89ae080d83dcc13cf8e81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cd73875650e1538c4c61d5e16d3db29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3e95410f3b4fcb0cba425b521d1f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9de4e638087c0ada4d1a5cbfbcecb752.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65ac334119ccd6204402a7aba29a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929a9775d23b40ff0936f275c0ffc014.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2009fb82309e856b4df54ad3ce808080.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d85623f82c7d166bc6ae6b403cb5b80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d817b898a4106c0fc24edee630a9eed9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0385df6c7f8ee7ab503b6ed35933695b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d85623f82c7d166bc6ae6b403cb5b80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65ac334119ccd6204402a7aba29a55.png)
![](https://img.xkw.com/dksih/QBM/2020/7/17/2507745673494528/2507780681883648/STEM/ec4a59f9e7d945e9b0d7fc25eda52607.png?resizew=307)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cd73875650e1538c4c61d5e16d3db29.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4ad4926e8bf2b42d8a2c568f80c1987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/997067e12aa5e1d9b00bb6a9299cb801.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c3ba703df54153b75c79c46d92df1c8.png)
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2020-07-17更新
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1480次组卷
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6卷引用:山东省临沂市2020年中考数学试题
山东省临沂市2020年中考数学试题(已下线)考点18 尺规作图与定义、命题、定理-备战2021年中考数学考点 核心考点清单(已下线)第25讲 与圆有关的计算与证明 (测)-2021年中考数学一轮复习讲练测2020-2021学年青岛版九年级数学上册第三单元 对圆的进一步认识 提升卷贵州省黔西南州兴义市金成学校2021-2022学年九年级上学期期中数学试题2023年安徽省淮南市谢家集区等3地中考二模数学试题
解题方法
5 . 如图,AB是⊙O的切线,切点为B,OA交⊙O于点C,∠AOB的平分线交AB于点D,连结CD.
(1)求证:CD是⊙O的切线;
(2)若AD=2BD,CD=2,求
、线段AB及线段AC围成的阴影部分的面积.
(1)求证:CD是⊙O的切线;
(2)若AD=2BD,CD=2,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfe6ad3e9bcbea2cfe382c3e74628286.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/29/da128174-00d0-45e3-9bfe-4249c0fa324d.png?resizew=162)
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6 . 如图,四边形
内接于
延长
交于点
.点
在
上,且
.
![](https://img.xkw.com/dksih/QBM/2020/6/26/2493106677374976/2493961686695936/STEM/44018f49f13b4e8cb9cbd2f5eaaee359.png?resizew=275)
(1)求证:
是
的切线;
(2)已知
,求
的长;
(3)在(2)的条件下,求图中阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03f843752c334821a4afdfe987a345f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba48366317ebea1c9dd5e4e67e03092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fe6d389a6c448d92b79d89bc9e8489f.png)
![](https://img.xkw.com/dksih/QBM/2020/6/26/2493106677374976/2493961686695936/STEM/44018f49f13b4e8cb9cbd2f5eaaee359.png?resizew=275)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f6640b80feea180991ff506b5afe41e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)在(2)的条件下,求图中阴影部分的面积.
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7 . 如图,四边形ABCD内接于⊙O,AC为直径,点D为弧ACB的中点,过点D的切线与BC的延长线交于点E.
![](https://img.xkw.com/dksih/QBM/2020/6/13/2483943881244672/2485387778678784/STEM/eead1d96626740d0820180c7ffadba95.png?resizew=119)
(1)用尺规作图作出圆心O;(保留作图痕迹,不写作法);
(2)求证:DE⊥BC;
(3)若OC=2CE=4,求图中阴影部分面积.
![](https://img.xkw.com/dksih/QBM/2020/6/13/2483943881244672/2485387778678784/STEM/eead1d96626740d0820180c7ffadba95.png?resizew=119)
(1)用尺规作图作出圆心O;(保留作图痕迹,不写作法);
(2)求证:DE⊥BC;
(3)若OC=2CE=4,求图中阴影部分面积.
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2020-06-15更新
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367次组卷
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3卷引用:2020年安徽省砀山县九年级质量调研数学试题
8 . 如图,在
中,
,以
为直径的
分别与
、
交于点
、
,过点
作
于点
.
![](https://img.xkw.com/dksih/QBM/2020/6/25/2492399014576128/2493759333597184/STEM/a9df6aa8744a4009878e554e2afbc60f.png?resizew=163)
(1)求证:
是
的切线;
(2)若
的半径为
,
,求阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/761a77e11e1e45c2a8b2d34d22cf8e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2020/6/25/2492399014576128/2493759333597184/STEM/a9df6aa8744a4009878e554e2afbc60f.png?resizew=163)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a36c66f6822678771b9d3753d969ae81.png)
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9 . 如图,点B、C、D都在⊙O上,过点C作AC∥BD交OB的延长线于点A,连接CD,且∠CDB=∠OBD=30°,BD=6
cm.
(1)求证:AC是⊙O的切线.
(2)求⊙O的半径长.
(3)求图中阴影部分的面积(结果保留π).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(1)求证:AC是⊙O的切线.
(2)求⊙O的半径长.
(3)求图中阴影部分的面积(结果保留π).
![](https://img.xkw.com/dksih/QBM/2020/6/5/2477874719817728/2478869163597824/STEM/ee2cc4ee87e743eea5534140d91e5ab4.png?resizew=198)
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2020-06-06更新
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2卷引用:2020年云南省红河州开远市中考数学5月模拟试题
10 . 如图,AB是⊙O的直径,C是⊙O上一点,OD⊥BC于点D,过点C作⊙O的切线,交OD的延长线于点E,连结BE.
(1)求证:BE与⊙O相切;
(2)若OD=DE,AB=6,求由
,线段BC,AB所围成图形的面积.
(1)求证:BE与⊙O相切;
(2)若OD=DE,AB=6,求由
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667349d99185bb045030b733352ff7fd.png)
![](https://img.xkw.com/dksih/QBM/2020/4/9/2437603576807424/2437689043787776/STEM/b574e8ff820148f4bd19b83bee6ea4e7.png?resizew=143)
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2020-04-09更新
|
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2卷引用:2020年新疆中考数学3月模拟试题