1 . 如图,在
中,
是
的平分线,
是外角
的平分线,
于点E,
于点D,连接
.若
,
,
,则
的长是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6691efd192e78833c453a798bc5e6cc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69ea4e0f76a73353b5e616f678b4dc67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e10efc3cf3ff47e72bf4d935a5c4c7e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7788830ed1cb3b9c5988f70f43595f2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/31/eb4d7668-46f9-405d-b2f1-11e53c86f904.png?resizew=170)
A.![]() | B.![]() | C.![]() | D.4 |
您最近一年使用:0次
2 . 如图,在等边
中,
为
的中点,
为
上的动点,以
为边作等边
,过点
作
的平行线
,交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/3/bada5790-4633-4e36-964d-8e539c21d8c5.png?resizew=132)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/3/d4478c0d-868f-410d-bfb0-71d2d467ca31.png?resizew=132)
(1)特例发现
如图①,当点
与点
重合时,直线
和
的位置关系是________;
与
的位置关系是________.
(2)类比探究
如图②,当点
移动到如图所示的位置时,上述结论还成立吗?如果成立,请写出证明过程;如果不成立,请说明理由.
(3)拓展延伸
如图③,在四边形
中,
,
,过点
作
于点
,过点
作
交
于点
,若
,
,请直接写出线段
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/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/a25c28359f8d8da9eaf4672a6cf8ae4f.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/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/3/bada5790-4633-4e36-964d-8e539c21d8c5.png?resizew=132)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/3/d4478c0d-868f-410d-bfb0-71d2d467ca31.png?resizew=132)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/3/3465cc00-d07f-487c-af1c-4a9b57dc9d49.png?resizew=132)
(1)特例发现
如图①,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(2)类比探究
如图②,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)拓展延伸
如图③,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02cd4fd97a975f810756a0b1324dcc93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77b1ce75a4b54d169ac6c607f3df86ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c51c25b65a37b676ae3c3b71c29f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/117878cbd8c00f2aabcdf62b487e2dc7.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/ecf7679c8b4b1e442ce4286d4b0e9c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f39fdcf98775b0a4960d6bc870eddfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
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3 . 在
中,已知
和
分别是两边上的中线,并且
,
,
,那么
的面积等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/509d8dd6031dc0ef92075877e53fe201.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/454328a8e75953fdb0835ce80d9566e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73538c09794f3223540bfe074edff82b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.28 | B.36 | C.34 | D.32 |
您最近一年使用:0次
2023-05-16更新
|
158次组卷
|
2卷引用:第17章 三角形 单元测试卷 人教版(五四制)七年级数学下册
18-19七年级下·全国·单元测试
名校
4 . 如图,
是
的中线,
,则
的长为______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/18/cccda65f-7b7e-40de-9f15-d50d2bb4cb4a.png?resizew=195)
您最近一年使用:0次
2022-07-15更新
|
265次组卷
|
5卷引用:2018-2019学年七年级下学期数学(北师大版)第04章 单元检测卷
(已下线)2018-2019学年七年级下学期数学(北师大版)第04章 单元检测卷鲁教版(五四制)七年级上册数学 第1章 三角形 单元测试卷福建省宁德市2021-2022学年七年级下学期期末数学试题广东省江门市新会区陈经纶中学2022-2023学年八年级上学期期中考试数学试题2022年湖南省长沙市芙蓉区中考二模数学试题
名校
5 . 如图,在
中,中线
相交于点
,如果
的面积是4,那么四边形
的面积是_________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69a8041349afa645a302c4d104fae7ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ae83a6fd399f8056b13de04328e8099.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddcbc4a1c603f1f9d5357d4f6e744fc6.png)
![](https://img.xkw.com/dksih/QBM/2022/1/13/2893833194643456/2898537492807680/STEM/143a0019-f67e-4b43-8c75-6d48305ec3c4.png?resizew=213)
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2022-01-20更新
|
257次组卷
|
3卷引用:第13章 平面图形的认识 单元测试 青岛版七年级下册数学
6 . 如图,在直角坐标系中,⊙A的半径为2,圆心坐标为(4,0),y轴上有点B(0,3),点C是⊙A上的动点,点P是BC的中点,则OP的范围是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/14/6ff59b30-c383-4fcd-8f70-878644e18685.png?resizew=170)
A.![]() | B.2≤OP≤4 | C.![]() ![]() | D.3≤OP≤4 |
您最近一年使用:0次
2020-02-03更新
|
336次组卷
|
7卷引用:第四章 几何图形初步【B卷】-2021-2022学年七年级数学上册同步必刷基础拓展单元卷(人教版)
(已下线)第四章 几何图形初步【B卷】-2021-2022学年七年级数学上册同步必刷基础拓展单元卷(人教版)四川省南充市2019-2020学年九年级上学期期末数学试题(已下线)第3章 圆的基本性质 达标检测卷(A卷)-2023-2024学年九年级数学上册《知识解读·题型专练》(浙教版)(已下线)第04讲 点与圆的位置关系-【帮课堂】2023-2024学年九年级数学上册同步学与练(人教版)四川省泸州市龙马潭区2022-2023学年九年级上学期期末数学试题(已下线)专题04 点与圆的位置关系(3个考点6大类型)(题型训练)-2023-2024学年九年级数学下册《知识解读·题型专练》(北师大版)2023年山东省泰安市泰山博文中学中考三模数学模拟试题
11-12八年级上·江苏苏州·阶段练习
名校
7 . 如图,△ABC中,点D、E分别在边AB、AC的中点,将△ADE沿过DE折叠,使点A落在BC上F处,若∠B=50°,则∠BDF=___ .
![](https://img.xkw.com/dksih/QBM/2019/11/12/2332218067574784/2332974608957441/STEM/2985a0e6898b420eaf622870a5229011.png?resizew=131)
您最近一年使用:0次
2019-11-13更新
|
930次组卷
|
14卷引用:2019年春北师大版七年级数学下册第4章达标测试卷
2019年春北师大版七年级数学下册第4章达标测试卷山东省济南市平阴县2019-2020学年七年级下学期期末数学试题(已下线)2011~2012学年江苏苏州姜堰市青云中学八年级上学期月考数学试卷2015届江苏省盐城市大丰市中考一模数学试卷2015-2016学年贵州省都匀市八年级上学期期中统考数学试卷2016届江苏省无锡市第一女子中学九年级下学期第一次月考数学试卷2016-2017学年山东临沂临沭县青云镇中心中学八年级上期中考数学卷广东省汕头市潮阳区铜盂镇2017-2018学年八年级11月月考数学试题安徽省阜阳市陈梦中学2017-2018学年八年级上学期第二次月考(期中)数学试题云南省红河州泸西县逸圃初级中学2017-2018学年八年级上学期期中考试数学试题山东省东营市河口区2017-2018学年度第一学期期末考试八年级数学试题新疆阿克苏十二中2017-2018学年八年级(上)期中数学试卷(已下线)《2018-2019学年同步单元双基双测AB卷》【浙教版】八上 期末测试卷1A卷河南省周口市第一初级中学2019-2020学年八年级期中数学试题
8 . 在
中,
,E为AB的中点,在AB延长线上取一点D,使
,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/673a7242e9a17d12438d7eb1b97bd54f.png)
![](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/3ab0389bef7fea9fd2429966ef6bf2d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/673a7242e9a17d12438d7eb1b97bd54f.png)
![](https://img.xkw.com/dksih/QBM/2019/7/1/2237346439086080/2238374669295617/STEM/26af8ee3a22640bab6efc354f8b3eef3.png?resizew=151)
您最近一年使用:0次
9 . 如图所示,
的周长等于26,点D、点E在边BC上,
的角平分线垂直于AE,垂足为点Q,
的角平分线垂直于AD,垂足为点P,若
,则PQ的长为多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ebb33adb2310a6e03918761e68204a.png)
![](https://img.xkw.com/dksih/QBM/2019/7/1/2237347050520576/2237375824748544/STEM/d77e873b4989492b8fd891e97eb11771.png?resizew=180)
您最近一年使用:0次
10 . 如图所示,
为等边三角形,
于R,
于S,则四个结论正确的是
点P在
的平分线上;
②
;
③
;
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b093939f3227eb9121751af58b9465b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab00db02a22bc96985e7c14a8de04e57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de9ccbcb773c5bd43d1fd59ad4778c53.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2462c9762871fe94dd1ea914fdbe282e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969ff16625fab92d735b81f4ef4508c3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/3/d454afcb-bd53-4b97-87ce-35cab71b4575.png?resizew=131)
A.全部正确 | B.仅![]() ![]() | C.仅![]() | D.仅![]() ![]() |
您最近一年使用:0次
2018-07-25更新
|
260次组卷
|
8卷引用:2016—2017北师大版数学七年级下册单元检测题:第五章生活中的轴对称
2016—2017北师大版数学七年级下册单元检测题:第五章生活中的轴对称(已下线)专题5.2 生活中的轴对称(提高篇)专项练习-【挑战满分】2020-2021学年七年级数学下册阶段性复习精选精练(北师大版)2015-2016学年山东省临沂市莒南县八年级上学期期末数学试卷重庆市江津区2017-2018学年八年级上学期第二次六校联考数学试题重庆市江津区2016-2017学年八年级下学期期末考试数学试题(已下线)中考考点总动员 考点27 等腰三角形人教版八年级上册数学 13.3 等腰三角形 同步练习山东省德州市宁津县第三实验中学、新城实验2023-2024学年八年级上学期期中数学试题