名校
1 . 如图,在
中,
,以
边为直径作
交
于点
,过点
作
于点
,
,
的延长线交于点
.
是
的切线;
(2)若
,且
,求
的半径与线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d64e0206b1814c35cc96bd2b6b12239a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5239826fca7bee4cab3a5a486cecb7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
您最近一年使用:0次
2024-04-15更新
|
214次组卷
|
5卷引用:江苏省宿迁市沭阳县怀文中学2022-2023学年九年级上学期1月月考数学试题
江苏省宿迁市沭阳县怀文中学2022-2023学年九年级上学期1月月考数学试题江苏省宿迁市沭阳县怀文中学2022-2023学年九年级上学期期末数学试题(已下线)专题06锐角三角函数的应用大题专练(五大类型)-【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(苏科版)2024年辽宁省初中学业水平训练卷(三) 数学模拟预测题2024年宁夏银川市北塔中学九年级中考第二次模拟九年级数学试题
2 . 如图,在
中,D、E分别为
、
边上的点
,点F为
边上一点,连接
交
于点G.则下列结论中一定正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d021981c03e75b1a246d899dcc64656.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/1ca46c55-878a-4c34-8f44-710376023f12.png?resizew=150)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
3 . 如图,延长矩形
的边
到点
,使
,连接
,
是
上一点,连接
交
于点
,交
于点
.
;
(2)若
,
,
,求
的长.
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e92f48e9bfe12d145f7d2a2f0360d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deaf896af5f5a09da3e50a7964d26ba1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a306417e43670260e4b68a928a22071f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a598a35e6a4bfb3a5f08b55b70bdc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
您最近一年使用:0次
2024-02-11更新
|
115次组卷
|
2卷引用:2022安徽中考【抓分卷】原创模拟试卷 数学 卷三
名校
4 . 如图①,在
中,
,
,点
为
边上的一点,连接
,过点
作
于点
,交
于点
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/3275c00d-5646-4535-9e34-1273c5c48047.png?resizew=381)
(1)求证:
;
(2)若
,求证:
;
(3)如图②,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9941b969048c0478a9d4116bfe4c6c32.png)
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c513dca3b8c31bc8d0ed4301e94cc1e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c287bb15494297df234f700f9f3a90d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497846628a41a9bc750a645e045afb47.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/3275c00d-5646-4535-9e34-1273c5c48047.png?resizew=381)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98de631bc856282e2e3f4be96d246b31.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acffe93671d43c027c1d6c57211cc242.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22292ff232cf4a28239313860ee4edbd.png)
(3)如图②,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9941b969048c0478a9d4116bfe4c6c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6402a3bb6be38f5bfafacc86c7bd008.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1a2a3ca97740b27193a7289833819ee.png)
您最近一年使用:0次
2024-01-27更新
|
54次组卷
|
9卷引用:2022年安徽省肥东县长临河中学中考模拟数学试题
2022年安徽省肥东县长临河中学中考模拟数学试题江西省抚州市2022-2023学年九年级上学期数学期末试题 2023年安徽省芜湖市南陵县中考数学模拟试卷(一) (已下线)2023年安徽省亳州市中考二模数学试题变式题21-23题(已下线)2023年安徽一模几何综合2 zkfxb-ah-09四川省成都市武侯区棕北中学2023-2024学年九年级上学期10月月考数学试题贵州省贵阳市南明区北京师范大学贵阳附属中学2023-2024学年九年级上学期期中数学试题安徽省淮北市六校联考2023-2024学年九年级下学期月考数学试题安徽省淮北市相山区淮北二中联考2023-2024学年九年级下学期月考数学试题
名校
5 . 如图,在正方形网格中,点A、B、C都在格点上,(要求仅用无刻度的直尺,不要求写画法,保留必要的作图痕迹)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/0226a3fb-cbd9-4c87-a748-a09038373fc7.png?resizew=363)
(1)在图1中,以C为位似中心,位似比为
;请画出放大后的
.
(2)在图2中,线段
上作点M,利用格点作图使得
.
(3)在图3中,利用格点在
边上作-个点D,使得
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/0226a3fb-cbd9-4c87-a748-a09038373fc7.png?resizew=363)
(1)在图1中,以C为位似中心,位似比为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d65e051e943ab28fa57aee2fb57994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
(2)在图2中,线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e3919b305d29ee107cee963a6c75aac.png)
(3)在图3中,利用格点在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ee8c0f94483e7502d8b7b97c43e2e8.png)
您最近一年使用:0次
2024-01-27更新
|
48次组卷
|
10卷引用:广东省深圳市南山区2022-2023学年九年级上学期期末考试数学试卷
广东省深圳市南山区2022-2023学年九年级上学期期末考试数学试卷广东省深圳市深圳实验学校初中部2023-2024学年九年级上学期月考数学试题广东省深圳市南山外国语学校(集团)高新中学2023-2024学年九年级上学期期中模拟数学试题广东省深圳市四校2023-2024学年九年级上学期期中联考数学试题(已下线)第07讲 图形的位似(9类题型)-【帮课堂】2023-2024学年九年级数学上册同步学与练(浙教版)(已下线)期末模拟测试卷02-2023-2024学年九年级数学上学期期末考点大串讲(北师大版)江苏省扬州市江都区江都区第三中学2023-2024学年九年级上学期10月月考数学试题(已下线)专题04 图形的位似(四大类型)(题型专练)-2023-2024学年九年级数学下册《知识解读·题型专练》(人教版)(已下线)第04讲 图形的位似(知识解读+真题演练+课后巩固)-2023-2024学年九年级数学下册《知识解读·题型专练》(苏科版)河南省驻马店市驿城区第四中学2023-2024学年九年级上学期1月月考数学试题
6 . 如图,在
中,
,
,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc5f88cdeb759d8227205d124262586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
A.4 | B.5 | C.6 | D.7 |
您最近一年使用:0次
2023-12-11更新
|
310次组卷
|
9卷引用:福建省宁德市2021-2022学年九年级上学期期末数学试题
福建省宁德市2021-2022学年九年级上学期期末数学试题广西壮族自治区贺州市八步区2020-2021学年九年级上学期期末数学试题福建省漳州市诏安县初中第一教研片2023-2024学年九年级上学期期中数学试题广东省佛山市禅城区2023-2024学年九年级上学期月考数学试题广东省佛山市禅城区明德中英文学校2023-2024学年九年级上学期第三次月考数学试题(已下线)专题04 图形的相似(知识串讲+热考题型+真题训练)-2023-2024学年九年级数学上学期期中期末考点归纳满分攻略讲练(北师大版)吉林省长春市绿园区2023-2024学年九年级上学期期末考试数学试题江西省南昌市2023-2024学年九年级上学期期末数学试题(已下线)专题09探索三角形相似的条件(7个知识点6种题型)-【帮课堂】2023-2024学年九年级数学下册同步学与练(苏科版)
名校
7 . 如图1,在
中,
,
,点
、
分别在边
、
上,
,连接
.将
绕点
顺时针方向旋转,记旋转角为
.
(1)[问题发现]
①当
时,
______;
②当
时,
的值是多少?请给出证明过程.
(2)[拓展研究]
试判断:当
时,
的大小有无变化?请仅就图2的情形给出证明;
(3)[问题解决]
在旋转过程中,
的最大值是多少?请直接写出答案.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/630d82ae0ed6deb825514e0bc92e74a0.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62ceb3cc7e4c368c7b13a65d463f3c60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/12/361973e9-54ef-4d87-982f-b05466adc897.png?resizew=421)
(1)[问题发现]
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/469451242301adbf795110cbb9154403.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc00342101809b43c1c3187dc0d06f9b.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31cb3cc93e355ace2adee68be0a068f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1672bf7cfa9a741651889f41855f6f3b.png)
(2)[拓展研究]
试判断:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ef047d4e8392c80f84689e659a7a98e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1672bf7cfa9a741651889f41855f6f3b.png)
(3)[问题解决]
在旋转过程中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
您最近一年使用:0次
2023-12-09更新
|
95次组卷
|
6卷引用:河南省驻马店市正阳县2021-2022学年九年级上学期期末数学试题
8 . 如图,在
中,点
在
边上,连接
,点
在
边上,过点
作
,交
于点
,过点
作
,交
于点
,则下列式子一定正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/476b0b8378f4b0f73f3dc5d84d89f616.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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9 . 如图,在
中,点
在
边上,连接
,
交
于点
.则下列结论正确的是( ).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/10/05759fae-4593-46b1-80f0-31b5c304a592.png?resizew=294)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/10/05759fae-4593-46b1-80f0-31b5c304a592.png?resizew=294)
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6卷引用:2022年黑龙江省哈尔滨市第一六三中学校中考模拟数学试题
2022年黑龙江省哈尔滨市第一六三中学校中考模拟数学试题2022年黑龙江省哈尔滨市第一六三中学中考二模数学试题(已下线)专题23.8 图形的相似章末拔尖卷-2023-2024学年九年级数学上册举一反三系列(华东师大版)(已下线)专题22.8 相似形章末拔尖卷-2023-2024学年九年级数学上册举一反三系列(沪科版)(已下线)专题4.8 图形的相似章末拔尖卷-2023-2024学年九年级数学上册举一反三系列(北师大版)(已下线)专题4.8 相似三角形章末拔尖卷-2023-2024学年九年级数学上册举一反三系列(浙教版)
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10 . 如图,四边形
是平行四边形,点
在
的延长线上,点
在
的延长线上,连接
,分别交
、
于点
、
,则下列结论错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/5/0d675364-6bad-47ee-8a6b-c6766bae3e40.png?resizew=161)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/5/0d675364-6bad-47ee-8a6b-c6766bae3e40.png?resizew=161)
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4卷引用:黑龙江省哈尔滨市呼兰区顺迈学校2021-2022学年九年级下学期开学考试数学(五四制)试题