1 . 如图,
为半圆的直径,半径
,先将该半圆沿直线
剪开得到两个圆心角为
的扇形,再把两个扇形经平移,使点
与点
,点
与点
分别重合(如图放置),则图中重叠部分(阴影部分)的面积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52705567101a48893de582656ef41527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6967ebd791092c62b4ef97924d91883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7a0387fc1258f31e44a10068c0ccfd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/27/af032fe7-f00e-4259-921b-da1e0c0855b3.png?resizew=443)
您最近一年使用:0次
2 . 如图1,
的半径为
,
的顶点
,
,
在
上,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/ae576eca-99dc-4ded-9f64-d0536984e3b4.png?resizew=376)
(1)求证:
是
的切线;
(2)若
也与
相切,求证:四边形
是菱形;
(3)如图2,
与
相交于点
,连接于
,当
时,求
的对角线
的长及阴影部分图形的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/095ab4a92bf822e175d370e6d0c8a730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/ae576eca-99dc-4ded-9f64-d0536984e3b4.png?resizew=376)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(3)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f51e114946a52a5621d4e9b73165fa28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
您最近一年使用:0次
名校
3 . 如图,在矩形
中,以A为圆心,
的长为半径画弧,交
于点F,再以B为圆心,
的长为半径画弧,交
于点E.已知
,
,则图中阴影部分的面积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/98cf33cf-386c-4687-984d-ec40f143dac8.png?resizew=131)
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2023-02-19更新
|
740次组卷
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5卷引用:重庆市北碚区西南大学附属中学校2022-2023学年九年级下学期月考数学试题
重庆市北碚区西南大学附属中学校2022-2023学年九年级下学期月考数学试题(已下线)2023年河南省驻马店市八校联考中考二模数学试题变式题11-15题(已下线)专题3.11 圆的基本性质章末八大题型总结(培优篇)-2023-2024学年九年级数学上册举一反三系列(浙教版)(已下线)专题24.13 圆章末十大题型总结(培优篇)-2023-2024学年九年级数学上册举一反三系列(人教版)(已下线)专题2.13 对称图形——圆章末十大题型总结(培优篇)-2023-2024学年九年级数学上册举一反三系列(苏科版)
名校
4 . (1)课本再现:如图1,
是
的两条切线,切点分别为A,B.则图中的
与
,
与
有什么关系?请说明理由,
分别与
相切于点A、B、C,且
,连接
,延长
交
于点M,交
于点E,过点M作
交
于N.
①求证:
是
的切线:
②当
cm,
cm时,求
的半径及图中阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a1dd47d59b9755e1815f18f3e22ef81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7081dada4c2d7e8b7372637a900dbe21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cebb7016268e2a6e7f6d90d5ca5d7585.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28c218de432d75a07b16c195a9a2b877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a22e02a2b59afc13899e1b1d7c5e57e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17bbafc96fb6a126c8636da9fcb217aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1be9321514a17079ba58986adc6e2ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4a0b269800bab3aee1cdb9d5cc0ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b02672185596d0be60de9e2e93afb59e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
您最近一年使用:0次
2023-02-16更新
|
314次组卷
|
4卷引用:江西省赣州市赣县区2022-2023学年九年级上学期数学期末数学试卷
江西省赣州市赣县区2022-2023学年九年级上学期数学期末数学试卷(已下线)2023四川省乐山市中考数学变式题22-26题2024年江西省大余县中考二模数学试题江西省抚州市金溪县第一中学2023-2024学年九年级下学期第二次月考数学试题
名校
5 . 如图,
是半圆
的直径且
.P为半圆
上一点(不与点A、B重合),D为
延长线上一点,
、
的角平分线相交于点C.在点P移动的过程中,线段
扫过的面积为____________ .
![](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/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59bafaec1cbb31d644a0df6bbd4fe4f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e98f2e85bdf9c6669c14f8966ed53be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/63889e76-a1bf-4337-b11c-bb54de321d74.png?resizew=174)
您最近一年使用:0次
2023-02-14更新
|
305次组卷
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4卷引用:浙江省宁波市江北区2022-2023学年九年级上学期期末数学试题
浙江省宁波市江北区2022-2023学年九年级上学期期末数学试题浙江省台州市椒江区书生中学2023-2024学年九年级上学期期中数学试题(已下线)专题10 浙江省九年级上期末试卷选择、填空易错压轴题训练-【好题汇编】备战2023-2024学年九年级数学上学期期末真题分类汇编(浙教版)浙江省宁波市江北区2022-2023学年九年级上学期期末检测数学试题
名校
6 . 如图,正方形的边
,弧
和弧
都是以2为半径的圆弧,则图中空白两部分的面积之差是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-01-23更新
|
657次组卷
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9卷引用:江苏省苏州市姑苏区苏州中学2022-2023学年九年级下学期开学测试数学试题
江苏省苏州市姑苏区苏州中学2022-2023学年九年级下学期开学测试数学试题(已下线)第14讲 对称图形—圆(全章复习与测试)-【暑假自学课】2023年新九年级数学暑假精品课(苏科版)(已下线)第12讲 弧长及扇形的面积(2种题型)-【暑假自学课】2023年新九年级数学暑假精品课(苏科版)(已下线)专题24.10 求与圆有关的阴影部分的面积的技巧五大题型-2023-2024学年九年级数学上册举一反三系列(人教版)(已下线)专题3.8 求与圆有关的阴影部分的面积的技巧五大题型-2023-2024学年九年级数学上册举一反三系列(浙教版)(已下线)专题2.10 求与圆有关的阴影部分的面积的技巧五大题型-2023-2024学年九年级数学上册举一反三系列(苏科版)江西省宜春市高安市第二中学和高安四中2023-2024学年九年级上学期月考数学试题山东省临沂市罗庄区2022-2023学年九年级上学期期中考试数学试题2024年江苏省苏州高新区实验初级中学九年级数学中考二模试题
7 . 如图,在扇形
中,
,
,点M为
上一点,连接
,将
沿
折叠得到
,点O落在点N处.当
与
所在的圆相切时,图中阴影部分的面积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed11b7055a8f679be4449932c9a36c38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aecc5996b6aafd4d0b9fd6700121522a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0edafce95aade0386bc0d78f679dcf47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9dac30a44c45952e701380deef7bbb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/7/410aba4e-5b6d-406a-ad43-c5d4e4c728c7.png?resizew=106)
您最近一年使用:0次
2023-01-15更新
|
188次组卷
|
3卷引用:河南省信阳市息县2022-2023学年九年级上学期期末数学试题
名校
8 . 已知,在半圆
中,直径
,点
、
在半圆
上运动,(点
、
可以与A、
两点重合),弦
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/17/b2a5f2ba-e887-485d-ad17-92a0efe0eaf2.png?resizew=629)
(1)如图1,当
时,求证:
;
(2)如图2,若
时,求图中阴影部分(弦
、直径
、弧
围成的图形)的面积;
(3)如图3,取
的中点
,点
从点A开始运动到点
与点
重合时结束,在整个运动过程中:
①求点
到
的最小值距离;
②直接写出点
的运动路径长______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24a968c73e960698a572ab01e3698.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/17/b2a5f2ba-e887-485d-ad17-92a0efe0eaf2.png?resizew=629)
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59f7abf31402fcfd6f86fb434adc37d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c99c9b81535f77e6c4ac21a33b9a75ba.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56e08c088f4281baf6c431ca4ee1fa0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(3)如图3,取
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
①求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
②直接写出点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
9 . 已知在圆
中,弦
垂直弦
于点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/17/b33e45c3-6c7d-4b03-87d4-c0e60f22f5a3.png?resizew=274)
(1)如图
:若
,求证:
;
(2)如图
:若
,
,
;
①求圆的半径;
②求弓形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/17/b33e45c3-6c7d-4b03-87d4-c0e60f22f5a3.png?resizew=274)
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/490b9624a31f9c93fa27b978da7b1719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca7e1a727ba332984ad857b3d25344d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1e41f9b90734fe376ef585dcbf03237.png)
①求圆的半径;
②求弓形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dfaad4c4467e27421876d8f2a4371d2.png)
您最近一年使用:0次
10 . 如图,有两块量角器完全重合在一起(量角器的直径
,圆心为
),保持下面一块不动,上面的一块沿
所在的直线向右平移,当圆心与点
重合时,量角器停止平移,此时半
与半
交于点
,连接
.
与半
有怎样的位置关系?请说明理由.
(2)在半
的量角器上,
、
点的读数分别为
、
时,问点
在这块量角器上的读数是多少?
(3)求图中阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6f6558fef858bf27e9811c2d9426fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6f6558fef858bf27e9811c2d9426fe7.png)
(2)在半
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfe639eab78eafd2d40ea70aa5d3f21d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235d495d88b8e51f89e2e4da27328025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)求图中阴影部分的面积.
您最近一年使用:0次
2022-12-15更新
|
221次组卷
|
5卷引用:2023年河南省南阳市镇平县六校联考中考数学三模试题
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