1 . 如图1,
中,
,
于点E,
于点D,
,
与
交于点F,连结
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/25/1ce9644b-2bed-4d6f-b6bb-102dfabeca83.png?resizew=396)
(1)求证:
;
(2)求
的度数;
(3)如图2,
,点P是线段
上一点,连结
,将
沿直线
翻折,使得点C落在同一平面内的点
处,当
为等腰三角形时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d320f180419175d75eebc618cc458b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ff29971ccc633d89832ffa9bd54afa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/25/1ce9644b-2bed-4d6f-b6bb-102dfabeca83.png?resizew=396)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5787c784b686435a2073bdeb836307c.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13a2e6494cf8d2dff0746a9bb72cef43.png)
(3)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d79e7020414add95907e061df505ef0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f4aa6359e027e952a897435224044db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4703d6d17f431d7b1156795f4a6e812.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c92b5799d12ea37de46d7c942ce7a9.png)
您最近一年使用:0次
2 . 【基础巩固】(1)如图1,在
中,
,D为
上一点,
,
.求证:
.
【尝试应用】(2)如图2,在(1)的条件下,
交
于点F.若
,
.求
的值.
【拓展延伸】(3)如图3,在(1)的条件下,若
,M,N分别是
,
的中点,请直接写出
周长的值.
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5cc2450dc300ce26b513c2abae28cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed8403902de9e7e6e428e25b8a24126e.png)
【尝试应用】(2)如图2,在(1)的条件下,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7099026716ee1821dd7d9f157dc055f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0ca5cf8bf873b1a42389169fd8a560f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be7ba0b6dbb952be352d73c1502e290e.png)
【拓展延伸】(3)如图3,在(1)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45abb6e07f693fb471db5032b7a41206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/22/60db16b6-1fbd-4ec3-8d6c-5676ca76b2f2.png?resizew=530)
您最近一年使用:0次
3 . 如图1,在
中,
分别是边
上的点.对“中位线定理”逆向思考,可得以下3则命题:
Ⅰ.若
是
的中点,
,则
是
的中点;
Ⅱ.若
,则
分别是
的中点;
Ⅲ.若
是
的中点,
,则
是
的中点.
(2)从以上命题中选出一个真命题,并进行证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
Ⅰ.若
![](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/950e82a0f9712457f2dd9f8a93f8a217.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
Ⅱ.若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b16460fcc52132ffaf8ef8e7b5fc746e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
Ⅲ.若
![](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/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)从以上命题中选出一个真命题,并进行证明.
您最近一年使用:0次
2024-02-05更新
|
59次组卷
|
6卷引用:第四章 平行四边形达标测试卷-2023-2024学年八年级数学下册《知识解读·题型专练》(浙教版)
(已下线)第四章 平行四边形达标测试卷-2023-2024学年八年级数学下册《知识解读·题型专练》(浙教版)江苏省南京市鼓楼区四校联考2022-2023学年八年级下学期期中数学试题山东省泰安市岱岳区2023-2024学年八年级上学期期末数学试题(已下线)第02讲 平行四边形的判定(2个知识点+5类热点题型讲练+习题巩固)-【帮课堂】2023-2024学年八年级数学下册同步学与练(人教版)(已下线)专题03平行四边形全章高频考点(考点清单,1个定理 1个性质4个图形的性质与判定4个技巧2种思想专练)原卷版河南省新乡市长垣市2023-2024学年八年级下学期期中数学试题
名校
4 . 已知四边形
内接于
(
),对角线
于点M,点N为线段
上一点,且
.
恰好经过圆心O,证明:
.
(2)如图2,若
不经过圆心O,
是否成立,请说明理由.
(3)在(2)的条件下,如图3所示,线段
与
交于点G,延长
交
于点F,连结
,若
,
,设
,
,请直接写出
的长(用x,y表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c1561853725e205f7c2c4bfff968814.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84757ce6c1f91aa44edc5a69cf0516a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53f1b040e95ecc3fa804433de5b449dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c5caadcd6d211df3a636f03d8b75ff7.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c5caadcd6d211df3a636f03d8b75ff7.png)
(3)在(2)的条件下,如图3所示,线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/075bc6df108c9c2b3b5ac46bca7c8d3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e6f92bb1a03aec522a1e456259ea56a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6967ebd791092c62b4ef97924d91883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac11e6ced49b157ac59dea1035ac7a53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b704e70d22c666892b05945271e412d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5622d18b84daade7db7ca4336f302a85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df2edbb9ff745f16729ff24b29a60679.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/862730f28c12750ebea0af5edcac5fef.png)
您最近一年使用:0次
2024-01-28更新
|
103次组卷
|
2卷引用:浙江省浙派·振兴联盟2023-2024学年九年级上学期期末数学试题
5 . 在
中,D,E分别是
,
的中点,延长
至点F,使得
,连接
.
是平行四边形.
(2)
于点G,连接
,若G是
的中点,
,
,
①求
的长.
②求平行四边形
的周长.
![](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/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cb27447c815a8a495ba5bf7040e265d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b312dab930cbbb9a4bb1a99f044dab73.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0972f8dc1e2a5720ea7bc57dfd9018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56512504254ab7f574a717dd6830fb33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8d0e934861e88097cbc34576af1dc9.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
②求平行四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b312dab930cbbb9a4bb1a99f044dab73.png)
您最近一年使用:0次
2024-01-22更新
|
293次组卷
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6卷引用:浙江省杭十五中教育集团2022-2023学年九年级下学期5月阶段检测数学试题
浙江省杭十五中教育集团2022-2023学年九年级下学期5月阶段检测数学试题 2023年浙江省杭州十五中教育集团中考数学模拟试题2023年浙江省杭州市保俶塔申花实验学校中考二模数学模拟试题2024年浙江省绍兴市新昌县部分学校九年级中考一模数学模拟试题安徽省六安市皋城中学2023-2024学年九年级下学期月考数学试题(已下线)专题04 四边形的证明与计算(全等、相似、边角计算)-2024年中考数学二轮热点题型归纳与变式演练(全国通用)
6 . 已知:如图1,在
中,
,点
是
的中点.求证:
.
下面是两位同学添加辅助线的方法:
请你选择一位同学的方法,并进行证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c71622531dfa894f21b2da123d020d24.png)
下面是两位同学添加辅助线的方法:
小刚:如图2,延长![]() ![]() ![]() ![]() ![]() | 小红:如图3,取![]() ![]() ![]() |
您最近一年使用:0次
2024-01-11更新
|
130次组卷
|
4卷引用:专题01 矩形的性质和判定(五大类型)(题型专练)-2023-2024学年八年级数学下册《知识解读·题型专练》(浙教版)
(已下线)专题01 矩形的性质和判定(五大类型)(题型专练)-2023-2024学年八年级数学下册《知识解读·题型专练》(浙教版)辽宁省辽阳市2023-2024学年九年级上学期期末数学试题(已下线)专题02 矩形的性质和判定(五大类型)(题型专练)-2023-2024学年八年级数学下册《知识解读·题型专练》(人教版)(已下线)专题05 矩形的性质和判定(五大类型)(题型专练)-2023-2024学年八年级数学下册《知识解读·题型专练》(苏科版)
2023八年级下·浙江·专题练习
7 . 已知:如图,在
中,点D、E分别是边
、
的中点,点F、G是边
的三等分点,
、
的延长线相交于点H.求证:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/8/983f2ba3-28b2-4c92-8ee8-e66bc74b8d87.jpg?resizew=231)
(1)四边形
是平行四边形;
(2)四边形
是平行四边形.
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/8/983f2ba3-28b2-4c92-8ee8-e66bc74b8d87.jpg?resizew=231)
(1)四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b07813edf63bca1db33ad6d3a2d69a.png)
(2)四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55bf39b6c78f5b45d8e5e908960e2cf5.png)
您最近一年使用:0次
名校
8 . 在
中,E为
的中点,请仅用一把无刻度 的直尺完成下列画图,不写画法,保留画图痕迹.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/7/5aec3d50-e77f-4677-a84c-7f82fe70574c.png?resizew=338)
(1)如图1,在
上找出一点P,使点P是
的中点.
(2)如图2,在
上找出一点Q,使点Q是
的一个三等分点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/7/5aec3d50-e77f-4677-a84c-7f82fe70574c.png?resizew=338)
(1)如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
您最近一年使用:0次
名校
9 . 如图,四边形
中,
,
,
,
,
.
是
的中点,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
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A.![]() | B.2 | C.![]() | D.3 |
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2024-01-07更新
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265次组卷
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16卷引用:2019年浙江省宁波市镇海区一模数学试题
2019年浙江省宁波市镇海区一模数学试题浙江省嵊州市2018-2019学年八年级下学期期末数学试题广东省深圳市深圳实验学校2018-2019学年八年级下学期期末数学试题人教版八年级下第十八章 平行四边形 专题3 构造三角形的中位线的常用方法陕西省宝鸡市渭滨区2018-2019学年八年级下学期期末数学试题2020年广东省肇庆市四会中学中考数学二模试题(已下线)【万唯原创】2021年河北试题研究-练册-第一部分第四章三角形4广西壮族自治区柳州市2020-2021学年八年级下学期期末数学试题2020年新疆乌鲁木齐市第十三中学第二次模拟考试数学试题2020年新疆乌鲁木齐市第十三中学第二次模拟考试数学试题黑龙江省佳木斯市同江市场直中学2022-2023学年七年级下学期期末数学试题黑龙江省伊春市部分中学2022-2023学年七年级下学期期末数学试题(已下线)专题02 特殊的平行四边形(十三大题型)-【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(山东专用)(已下线)专题9.14 矩形(知识梳理与考点分类讲解)-2023-2024学年八年级数学下册基础知识专项突破讲与练(苏科版)贵州省六盘水市2022-2023学年八年级下学期期末数学试题福建省泉州市实验中学2023-2024学年八年级下学期期中数学试题
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D.若![]() ![]() |
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