如图,四边形
内接于
,且
为直径,
,过A点的
的垂线交
的延长线于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/13/97b0358f-c138-460b-97dc-ccb63c24c057.png?resizew=230)
(1)求证:
;
(2)如果
,求图中阴影的面积.
![](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/b27e47690ed332c573186992b6d25654.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/13/97b0358f-c138-460b-97dc-ccb63c24c057.png?resizew=230)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/024dc2ccbbe321774df5d44e8785b203.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a88c44f558705de3bcefcfc0ece96b8f.png)
2022·山东济宁·一模 查看更多[3]
2022年山东省济宁邹城市中考一模数学试题2022年山东省邹城市初中学业水平模拟检测(一模)数学试题(已下线)第11讲 弧长及扇形的面积-【帮课堂】2022-2023学年九年级数学上册同步精品讲义(苏科版)
更新时间:2022-05-01 17:25:27
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解答题-证明题
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【推荐1】已知在△ABC中,AB=AC,以AB为直径的⊙O分别交AC于点 D,BC于点E,连接ED.求证:ED=EC.
![](https://img.xkw.com/dksih/QBM/2019/11/27/2343070107688960/2344255635398657/STEM/76b8a578bbea49fe87e2ee91692973f8.png?resizew=130)
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解答题-问答题
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【推荐1】如图,AB为⊙O的直径,弦
,
,
的平分线交⊙O于点D,求:
(1)BC,AD的长;
(2)图中两阴影部分面积之和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb01d2b57580731c8b807ac8cffc8ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
(1)BC,AD的长;
(2)图中两阴影部分面积之和.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/12/800837b2-3564-404f-989c-39a3153da9cc.png?resizew=133)
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【推荐2】如图,
、
为
的直径,弦
于点
,点
在
延长线上,
交弦
于点
,
为
的中点,
.
![](https://img.xkw.com/dksih/QBM/2022/4/28/2967737961816064/2974158835531776/STEM/17b82f68-3243-4f66-9d43-d6737d86a962.png?resizew=261)
(1)求证:
为
的切线;
(2)求
,求图中阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a85c3ec0cba7731bc670e38b10177c3.png)
![](https://img.xkw.com/dksih/QBM/2022/4/28/2967737961816064/2974158835531776/STEM/17b82f68-3243-4f66-9d43-d6737d86a962.png?resizew=261)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df003447e98fd5ba9badd42177f345db.png)
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解答题-证明题
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【推荐1】如图,在
中,
,以
为直径作
交
于点
,交
于点
,
平分
,且
,连接
.
是
的切线;
(2)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73e99c17d72c203b50802f19d4731545.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316f25900ff3dac06fc7e65d8aec06fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6f9353ca110c8b81561455b232dbc15.png)
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解答题-作图题
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【推荐2】如图,已知Rt
.
![](https://img.xkw.com/dksih/QBM/2022/4/23/2964405170724864/2966677571231744/STEM/8081ce4ba7a440b490ab308ee16c15d5.png?resizew=212)
(1)请利用没有刻度的直尺和圆规作出一个圆,使圆心
在
上,且与
、
所在直线相切.(注:不写作法,保留作图痕迹,对图中涉及到的点用字母进行标注)
(2)在上题中,若已知
,
,求出所作
的半径.
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![](https://img.xkw.com/dksih/QBM/2022/4/23/2964405170724864/2966677571231744/STEM/8081ce4ba7a440b490ab308ee16c15d5.png?resizew=212)
(1)请利用没有刻度的直尺和圆规作出一个圆,使圆心
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)在上题中,若已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad4c0ba3a6750537789844d0ec419d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b939af5ba06e279cce39396aaf0fae06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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