1 . 已知在
中,
,点D为
边上一动点,以
为边,在
的右侧作等边三角形
.
平分
时,四边形
是______形.
(2)如图(2),过点E作
于点F,
与
具有怎样的关系?F为
的中点吗?说明理由.可得出结论,无论运动到何处,点E在
的何处?
(3)如图(3),若
,利用(2)中结论.
①当D为
的中点时,过点E作
于点G,求
的长;
②点D从点B运动到点C,则点E所经过的路径长为多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/052b54fe911c39672315682c7a7e6b56.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ea91137f4427a67f3a8783d974ef7e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bc1cbcd6d00f0c36bad8254297d9f33.png)
(2)如图(2),过点E作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8de4a54cc7818be87a239f6de5f5d05b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(3)如图(3),若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
①当D为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c13ab7f17263c4e6163d960f1c5060.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
②点D从点B运动到点C,则点E所经过的路径长为多少?
您最近一年使用:0次
2 . 在数学兴趣小组活动中,同学们由一道有关正方形中两条互相垂直的线段的数量关系的问题出发,进行了一系列类似的数学探究活动,请你解决以下问题.
【母题溯源】
(1)如图1,在正方形
中,点E,F分别是
,
上的两点,
,垂足为点G,则
;
【类比探究】
(2)如图2,在矩形
中,
,点E是
上一点,
,垂足为点G,求
的值;
(3)如图3,在四边形
中,
,点E为
上一点,连接
,过点C作
的垂线交
的延长线于点G,交
的延长线于点F,求
的值;
【母题溯源】
(1)如图1,在正方形
![](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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7cc087c22e1fc1197236c71e5465d33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74e2da60823a045e1ecb82f478fb8300.png)
【类比探究】
(2)如图2,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7be43133910b48169f27dea860c9d8ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a45b04cc3e5adaeff6f9e01e29032803.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8775dcf60ad143bc59a58b000f374c56.png)
(3)如图3,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28564019866c810da5710082e4b4a224.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eaa7d20e48bde20c8ab18ffb341285e.png)
您最近一年使用:0次
3 . (1)计算:
;
(2)如图,在
中,
,
,垂足分别为
、
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3de865872b093d6004ac0cfe2ab1e77e.png)
(2)如图,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc840e197de2dabff676ee1b8968fada.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1ff7bf8ffc8a04186e3e13c1a6d5ced.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/d8ce1475f537b4ad21775bfaa16daa0c.png)
您最近一年使用:0次
4 . 初步探究
(1)如图1,在四边形
中,
相交于点O,
,且
,则
与
的数量关系为 .
迁移探究
(2)如图2,在四边形
中,
相交于点O,
,(1)中
与
的数量关系还成立吗?如果成立,请说明理由.
拓展探究
(3)如图3,在四边形
中,
相交于点O,
,且
,求
的长.
(1)如图1,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4ef285d0b087b41d8f744108b546d77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/208f155347298c2ad3949346c85aa504.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
迁移探究
(2)如图2,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4ef285d0b087b41d8f744108b546d77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
拓展探究
(3)如图3,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/664f0d25799bef33c02205693f7be08c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cafc1c92f49c99862f4b1701f188562.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
您最近一年使用:0次
5 . 在平面直角坐标系中,点
在直线
上,点
的横坐标为
,若线段
绕点
旋转
后,得到点
的对应点
,且点
在第一象限内,则点
的坐标为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c60ecd5f53b3469726c8cb09e86ff20b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/996563be5eea3aa283208687e8bad1ad.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/c02b54dc6b3e1bb6544f47d4c8743fcf.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
您最近一年使用:0次
6 . 小丽与爸妈在公园里荡秋千,如图,小丽坐在秋千的起始位置
处,
与地面垂直,两脚在地面上用力一蹬,妈妈在距地面
的
处接住她后用力一推,爸爸在
处接住她,
于点
,
于点
,若爸爸到
的水平距离
,
,
(参考数据:
,
,
).
;
(2)求妈妈到
的水平距离(即
的长);
(3)求秋千的起始位置
距地面的高
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01f8039a874d818f0067ad4dc93bdd33.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/5a67bb733403810fa80c0d758e537645.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dec44a1f53ea3b2f972012ec84ce0fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/472a09e99cdd352e69d455723b19260d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/886c25cbaff27a9c4cf52dacec0eac4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b1ab28a1e8e4851895938456ea8e51e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f986badfc5dea707c164e2ab6c98dd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb8485466d2127bd681a322f87c58f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67802092c4c9f3b1cff1f9502b7d1ded.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b443674e3ba8c5adc2ce50055b18521.png)
(2)求妈妈到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(3)求秋千的起始位置
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
您最近一年使用:0次
7 . (1)计算:
.
(2)如图,在菱形
中,过点
分别作
于点
,
于点
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c580b67566fdf64530d902f58af7425.png)
(2)如图,在菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d276d0010fd458383ea3dd61415e1aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7faabc484ce3666706c1beffda4bcfe2.png)
您最近一年使用:0次
8 . (1)计算:
;
(2)如图,点
是线段
的中点,
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ee5d0fc5c56be85701f9c2875507127.png)
(2)如图,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6b867089fda5483795f4c09de6c5619.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b83e4f28c096dffd7df54b1162f5b3ae.png)
您最近一年使用:0次
9 . 已知在平面直角坐标系中存在点
,将点A向右平移2个单位后,以原点O为旋转中心逆时针旋转
后得到点
,则
的坐标为__________ ;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/184fa9ec6030eb7e9b0095a5a1ecd580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
您最近一年使用:0次
2024-04-22更新
|
285次组卷
|
4卷引用:数学(江西卷)-【试题猜想】2024年中考考前最后一卷
数学(江西卷)-【试题猜想】2024年中考考前最后一卷2024年辽宁省大连市第七十六中学中考一模演练数学试题(已下线)专题3.19 图形的平移与旋转(全章常考核心考点分类专题)(基础练)-2023-2024学年八年级数学下册基础知识专项突破讲与练(北师大版)(已下线)热点09 图形变化(平移、旋转、对称)(9大题型+满分技巧+限时分层检测)-2024年中考数学【热点·重点·难点】专练(广东专用)
10 . 图1是井冈山红旗雕塑的实物图,其正面可大致简化成图2,底座
,
,红旗边
,
,
,
,点
,
,
在同一条直线上.
,求证:
.
(2)求雕塑顶端
到地面
的距离.
(参考数据:
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/709762f6abfd11c7c2e51ea6a750aa00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e076169c8b2a5b953ead5525a3c9644.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/019a351c8982e78e7c69503880e2f7a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49d687bea28cb8cb8466dd606546dde3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a11be1dce47ca9df1e6999b55c4917.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dd24906e2f368c2f182b5c9219f13bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4cda687dd3f74d58635c5e053b40887.png)
(2)求雕塑顶端
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f27acebe4b2151ece74173c272a2fee9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f8999253a9aae29d2363a1f8d26d841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/097b2e089c432375c4e5280061809b7a.png)
您最近一年使用:0次
2024-03-31更新
|
306次组卷
|
3卷引用:2024年江西省南昌市南昌县中考一模模拟示范卷数学试题
2024年江西省南昌市南昌县中考一模模拟示范卷数学试题2024年江西省九江市修水县散原中学分校中考模拟数学试题(已下线)抢分通关07 锐角三角函数解决实际问题(2易错7题型)-备战2024年中考数学抢分秘籍(全国通用)