1 . 如图,在平行四边形
中,点
,
分别在边
,
上,且四边形
为正方形.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/e2dabe96-4270-45a8-80f8-3fdd78cc3ace.png?resizew=170)
(1)求证:
;
(2)若平行四边形
的面积为
,
,直接写出线段
的长为 ___________.
![](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/a0ed1ec316bc54c37c4286c208f55667.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/910936ec9fb419d51ce2f5ea817f8401.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/e2dabe96-4270-45a8-80f8-3fdd78cc3ace.png?resizew=170)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa6ca6245c7cebc60a9fc319289adc7.png)
(2)若平行四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbbecbd7e92dcbe1766462fcf40066de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78c1e75eb744576c32eed3f9d20f9558.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
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2 . 如图,点P是
的重心,过点P作
交
,
于D,E,
交
于点F,若
,则
的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/e3893c5e-fcfb-4616-8bf3-d94cebe554a6.png?resizew=148)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/105068b25f5a63af32f4082cfe08691e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee73452ee4d5437f1399f1235b95e55f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59efa8fd3ef37ad668263448608fb6b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/e3893c5e-fcfb-4616-8bf3-d94cebe554a6.png?resizew=148)
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 如图,等腰
中,
,
,将
绕点A逆时针旋转一定角度
(
)得到
,点B、C的对应点分别是D、E.连接
交于点F,连接
交于点G.
![](https://img.xkw.com/dksih/QBM/2023/1/8/3148236801572864/3148527410823168/STEM/a709a525520a4a57a18964651be1efc8.png?resizew=175)
(1)用含
的代数式表示
的度数;
(2)当
时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/726fe082525cb856b6ebe3e1d9612670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45cdbb5fc85cf916c43e9853a9535371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c16f5e270be3addb79259b8256fe735b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee06d1b67343eac57e4bc24580799c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f677175ac1313c715bf876123f7573c2.png)
![](https://img.xkw.com/dksih/QBM/2023/1/8/3148236801572864/3148527410823168/STEM/a709a525520a4a57a18964651be1efc8.png?resizew=175)
(1)用含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96dbf32210f81599fa2a02983ac84cac.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/684d328b02462aa25a936d1c83eee4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
您最近一年使用:0次
2023-01-08更新
|
378次组卷
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5卷引用:2022年福建省泉州市惠安县初中毕业班质量检测数学试题
2022年福建省泉州市惠安县初中毕业班质量检测数学试题(已下线)九年级上册期中测试试卷01-2022-2023学年九年级数学上册同步考点知识清单+例题讲解+课后练习(人教版)(已下线)第二十三章 旋转 单元过关检测01-2022-2023学年九年级数学上册同步考点知识清单+例题讲解+课后练习(人教版)辽宁省鞍山市五十一中等三校2022-2023学年九年级上学期11月月考数学试题湖北省天门市八校联考2022-2023学年九年级上学期期中数学试题(普通班)
4 . 如图1,平面直角坐标系中,
轴,
,C是点A关于x轴的对称点,
,交x轴于点E,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/8/cef620d5-e281-4d8d-8502-27c5c69863d0.png?resizew=389)
(1)求证:
①
平分
;
②
是等边三角形;
(2)如图2,若F在
上,
,连接
,点B的坐标为
,直接写出点F的坐标(用a、b表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc195a9f7ac138e5a1ad87d5fa201c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09cf17ee13e937cd8b84879da17d15b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8913d6a8e5021895e6ee06f9c067270d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/8/cef620d5-e281-4d8d-8502-27c5c69863d0.png?resizew=389)
(1)求证:
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/418ebb89d29f4f631b055c911e8d178a.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fb6772cca18f6f1cfb7c961a425c8b2.png)
(2)如图2,若F在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0d72883fd2f01456de0bcc0f9d95202.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/472630cb9d24294eb39f2a08a63b3537.png)
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2023-01-06更新
|
404次组卷
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10卷引用:辽宁省大连市沙河口区2022-2023学年八年级上学期期末数学试题
辽宁省大连市沙河口区2022-2023学年八年级上学期期末数学试题(已下线)专题9.33 平面直角坐标系背景下的平行四边形(巩固篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(苏科版)(已下线)专题18.7 平行四边形的判定(巩固篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(人教版)(已下线)专题18.14 平面直角坐标系背景下的平行四边形(巩固篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(人教版)(已下线)专题4.13 平行四边形的判定定理(巩固篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(浙教版)(已下线)专题4.20 平面直角坐标系背景下的平行四边形(巩固篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(浙教版)(已下线)专题19.10 平行四边形的判定(巩固篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(沪科版)(已下线)专题19.17 平面直角坐标系背景下的平行四边形(巩固篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(沪科版)(已下线)专题6.7 平行四边形的判定(巩固篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(北师大版)(已下线)专题6.17 平面直角坐标系背景下的平行四边形(巩固篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(北师大版)
5 . 如图,已知在四边形
中,
,
,
,
,
,动点
从
开始沿
边向点
以
的速度运动,动点
从点
开始沿
边向点
以
的速度运动,
、
别从点
、
同时出发,当其中一点到达端点时,另一点也随之停止运动,设运动的时间为
秒.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/b851bc52-9284-465e-87dc-feedecf3cb8d.png?resizew=180)
(1)当
为何值时,四边形
为矩形?
(2)当
为何值时,
?
(3)当
为何值时,
?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f52b96ec999ba7c3ecf04e13aa91bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cee49e97546d466ba3ee630e08cdc3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ea66fef72e9e929f2315f85dc01a6a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5631e6ec24d3d67bf4592313b6b3f4f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e5acdedbab4bba6a4f5defc72c70b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/b851bc52-9284-465e-87dc-feedecf3cb8d.png?resizew=180)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe83f1ae7e5f05d8bed6bf6f42db0e7d.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b10bb426e00de29d8664ca5babb2f4f3.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8896ed0102f70210e9ba146f09ca0665.png)
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2023-01-05更新
|
319次组卷
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5卷引用:广东顺德德胜学校2021-2022学年八年级下学期期中数学试题
广东顺德德胜学校2021-2022学年八年级下学期期中数学试题广东省江门市广州广雅中学江门学校2021-2022年八年级下学期期中考试数学试题(已下线)专题9.14 矩形(巩固篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(苏科版)(已下线)第2章 四边形(A卷·知识通关练) -【单元测试】2022-2023学年八年级数学下册分层训练AB卷(湘教版)广东省肇庆市怀集县2022-2023学年八年级下学期期中数学试卷
6 . 已知:如图,在平行四边形
中,
分别是
和
的角平分线,交
于点E,F连接
.
![](https://img.xkw.com/dksih/QBM/2023/1/3/3144733744005120/3145756721045504/STEM/554037ff08da424a8eb740ecf2cef509.png?resizew=165)
(1)求证:
互相平分;
(2)若
,求四边形
的周长和面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/343f75e17b862051b15696334fec1eff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdcf86f7cf381c563ad80af86feeed83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1208bfb2119830e54efb6674e25f0c.png)
![](https://img.xkw.com/dksih/QBM/2023/1/3/3144733744005120/3145756721045504/STEM/554037ff08da424a8eb740ecf2cef509.png?resizew=165)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1fa63411b334ce13037ac0e81166e5b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f606531dd76428c6a3afe719de4f66ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f3c15b30bd155641e548a7d8c172dd4.png)
您最近一年使用:0次
2023-01-04更新
|
734次组卷
|
15卷引用:【全国区级联考】哈尔滨市道外区2018年初中升学考试调研测试二数学试题
【全国区级联考】哈尔滨市道外区2018年初中升学考试调研测试二数学试题江西省上饶市广丰区丰溪街道南屏中学2018-2019学年八年级下学期第一次质量检测数学试题江西省萍乡市2018-2019学年八年级第二学期期末教学质量抽测数学试题湖北省襄阳市枣阳市吴店镇第二中学2021-2022学年八年级下学期4月月考数学试题江苏省徐州市金榜国际学校2020-2021学年八年级下学期月考数学试题(已下线)专题9.28 中心对称图形——平行四边形(全章复习与巩固)(知识讲解)-2022-2023学年八年级数学下册基础知识专项讲练(苏科版)(已下线)专题18.6 平行四边形的判定(基础篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(人教版)(已下线)9.3 平行四边形(第2课时)(练习)-2022-2023学年八年级数学下册同步精品课堂(苏科版)(已下线)专题4.12 平行四边形的判定定理(基础篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(浙教版)(已下线)22.2.2 平行四边形的判定-2022-2023学年八年级数学下册《考点·题型·技巧》精讲与精练高分突破系列(沪教版)(已下线)专题19.9 平行四边形的判定(基础篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(沪科版)(已下线)专题 4.33 平行四边形(全章复习与巩固)(基础篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(浙教版)(已下线)专题 4.32 平行四边形(全章复习与巩固)(知识讲解)-2022-2023学年八年级数学下册基础知识专项讲练(浙教版)(已下线)核心考点02 平行四边形-【满分全攻略】2022-2023学年八年级数学下学期核心考点+重难点讲练与测试(苏科版)(已下线)专题6.6 平行四边形的判定(基础篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(北师大版)
名校
7 . 如图,在四边形
中,
,
,
,点
从
出发以
的速度向
运动,点
从
出发以
的速度向
运动.两点同时出发,当点
运动到点
时,点
也随之停止运动.若设运动的时间为
秒,以点
、
、
、
、
、
任意四个点为顶点的四边形中同时存在两个平行四边形,则
的值是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9d291cfc6c4677d20f8674c57322b46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf2732c063f01d83e8f7cfc2b138732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b9174c3b1324cf81098e42e0480bcc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc2d9b900111188aca83126dff97f32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/2023/1/2/3144193205280768/3145652587814912/STEM/9c757385b3da4e1f8280d499d94f1f10.png?resizew=198)
您最近一年使用:0次
8 . 如图是由36个小正方形组成的网格图,每个正方形的顶点都称为格点,
的三个顶点A、B、C都在格点上,请按要求完成下列作图,每个小题只需做出一个符合条件的图形.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/4/71aad972-ebbe-4442-b887-0a50f8e23318.png?resizew=391)
(1)在图1中,画出与
面积相等的格点
(不与
全等);
(2)在图2中,画出与
相似的格点
,且相似比为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/4/71aad972-ebbe-4442-b887-0a50f8e23318.png?resizew=391)
(1)在图1中,画出与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)在图2中,画出与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bd2625c8089746463fccf49e335410c.png)
您最近一年使用:0次
名校
解题方法
9 . 如图①,在
中,
,
,
,点
为边
的中点.动点
从点
出发,沿折线
向终点
运动,点
在
边上以每秒3个单位长度的速度运动,在
边上以每秒5个单位长度的速度运动,在点
运动的过程中,过点
作
的平行线,过点
作
的平行线,两条平行线相交于点
.点
不与点
、点
重合.设点
的运动时间为
秒.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/4/460bc3fb-1561-4155-a526-6c8b5183db91.png?resizew=313)
(1)用含
的代数式表示
的长;
(2)当四边形
是轴对称图形时,求出
的值;
(3)连接
,如图②,当
将
的面积分成
两部分时,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afc0d8c4e945e4230252a7b4c97d39ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/4/460bc3fb-1561-4155-a526-6c8b5183db91.png?resizew=313)
(1)用含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
(2)当四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4380f643727360214c8b2c6500fea048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ecac2dad4cffdd971fd23deacff3fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ecac2dad4cffdd971fd23deacff3fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf17ea1e2af6141441bd2f6e93314be9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
名校
10 . 如图,在正方形
中,
,点E、F分别在边
、
上,且
,将线段
绕点F顺时针旋转90°至线段
,连接
,则线段
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.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/92034dd2bb9480b18709d01153467f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/440334b2-3a60-4951-94f8-ce35e5d3f3e6.png?resizew=113)
您最近一年使用:0次