名校
1 . 如图,在正方形
中,
,点
分别在边
和
上.且
.
与
交于点
,点
是
的中点.则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0acaca7ce64a0f698cd854915fffc06.png)
__________ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92e29fcd40e54920711de689e10933a3.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc58788441e3efd15ed35c324b38b0a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0acaca7ce64a0f698cd854915fffc06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92e29fcd40e54920711de689e10933a3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/6/52799310-9a47-42b1-8c39-8ae8dc10357f.png?resizew=140)
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2卷引用:2023年海南省海口市龙华区海南华侨中学初中学业水平考试仿真试题数学模拟预测题
名校
2 . 在
中,
的平分线交直线
于点E、交
的延长线于点F,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/6/c0f5f558-4209-4584-b916-627d50632a5b.png?resizew=362)
(1)如图1,若
,G是
的中点,连接
、
.
①求证:
.
②请判断
的形状,并说明理由;
(2)如图2,若
,将线段
绕点F顺时针旋转
至
,连接
、
,那么
又是怎样的形状.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/6/c0f5f558-4209-4584-b916-627d50632a5b.png?resizew=362)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4795ee1f96b430529934e2231b38885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d96a5d40d0aea9f4398ca4d0fe9b0dd.png)
②请判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb1975abdfba3d89ee75a40e4239f6e7.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a58a622e2b1a239f2f96aa1501e9799.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad1b0a76a887783392268ae203ad22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb1975abdfba3d89ee75a40e4239f6e7.png)
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13卷引用:2023年山东省淄博市高青县中考一模数学试题
2023年山东省淄博市高青县中考一模数学试题2023年山东省淄博市高青县中考一模数学试题2023年甘肃省定西市临洮县中考模拟(二)数学模拟试题山东省高密市2017届九年级下学期学业水平测试(三)数学试题贵州省贵阳市云岩区第二实验中学2019-2020学年九年级下学期4月月考数学试题黑龙江省齐齐哈尔市龙江县10校联考2022-2023学年八年级下学期期中数学试题广东省岭南师范学院附属中学、湛江市东方实验学校 2022-2023学年八年级下学期期中数学试题黑龙江省齐齐哈尔市龙江县2022-2023学年八年级下学期期中数学试题(已下线)专题07+平行四边形与特殊平行四边形1(5大易错点分析)-备战2024年中考数学考试易错题(浙江专用)2014-2015学年湖北省武汉市江夏区八年级下学期期中考试数学试卷陕西省城固县2018-2019学年八年级下学期期末考试数学试题四川省成都市嘉祥外国语学校2019-2020学年八年级下学期数学入学考试题广东省江门市广德实验学校2020-2021学年八年级下学期第一次月考数学试题
3 . 如图,在平面直角坐标系中,点
,点
是
轴负半轴上一动点,以线段
为一边,在其一侧作等边三角形
.当点
运动到原点
处时,记点
的位置为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/6/ee9946c0-2edb-4a11-a040-cb01a0afb993.png?resizew=183)
(1)当点
在
轴负半轴上运动时,
求证:
为定值.
连接
,求
的最小值.
(2)当
时,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baaf13627819890607661d8eb55efa83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1de7da3ab92e70f135ea628a691167.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/6/ee9946c0-2edb-4a11-a040-cb01a0afb993.png?resizew=183)
(1)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95108f5aa7f7ed0f6e556fb50cdbae98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0009063fe00277645aff1be6e32471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0009063fe00277645aff1be6e32471.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/259a6725a9231c13ee8775d84ea397ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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4 . 已知正方形
与正方形
,正方形
绕点
旋转一周.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/13/449876ed-fbb5-458f-a33c-2b3376a659a1.png?resizew=374)
(1)如图1,连接
,很明显
______,从而我们可以得出
的值为______;
(2)如图2,连接
,求
的值;
(3)当正方形
旋转至图3位置时,连接
,分别取
的中点
,连接
,试探究:
与
的关系,并说明理由;
(4)连接
,分别取
的中点
,连接
,
,请直接写出线段
扫过的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/13/449876ed-fbb5-458f-a33c-2b3376a659a1.png?resizew=374)
(1)如图1,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5f3a9809eff933114eed37314886e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/784c0934f4a7336dc47e71b2b930e61b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a620cc8079ad5b3700261e078423c06e.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c41957ce69c1c74d287e37b7417ac18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9af4ea989fa0a89c7fef51255a92116b.png)
(3)当正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69995843d21aed8728363afe2fbb6462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69995843d21aed8728363afe2fbb6462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(4)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b352224f4c340d324f746317865e4a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b352224f4c340d324f746317865e4a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ac8db488ff9644518e26fbaa8ff6074.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce2790947716b1cfa9c5e7a65db4093.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb6823a329628699619a39cde927510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce2790947716b1cfa9c5e7a65db4093.png)
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5 . 阅读材料:小明喜欢探究数学问题,一天杨老师给他这样一个几何问题:
如图①,
和
都是等边三角形,点
在
上.
求证:以
、
、
为边的三角形是钝角三角形.
【探究发现】小明通过探究发现:连接
,根据已知条件,可以证明
,
,从而得出
为钝角三角形,故以
、
、
为边的三角形是钝角三角形.请你根据小明的思路,写出完整的证明过程.
【拓展迁移】如图②,四边形
和四边形
都是正方形,点
在
上.
①猜想:以
、
、
为边的三角形的形状是________;
②当
时,直接写出正方形
的面积.
如图①,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
求证:以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
【探究发现】小明通过探究发现:连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421291381be28da4bd16560fd383b4a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbe3628cbba01eb3089dacdc891a8ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0acc93490a6a784eb62201d93dd93d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
【拓展迁移】如图②,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72794bd3cbe1a898e2254c3dd98a437e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
①猜想:以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce6c477a3c943ab74038602536cb4393.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72794bd3cbe1a898e2254c3dd98a437e.png)
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6 . 如图,在
中,
,
,点
是
边的中点,点
是
边上一个动点,连接
,以
为边在
的下方作等边三角形
,连接
,则
的最小值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/19/1b470f3f-d7c6-4c62-aefa-597cce9c2e3f.png?resizew=150)
![](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/209acf15985d1ea1ad86fc4a37e38c0b.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/262b958cb704607cd5c0a92253de258e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/19/1b470f3f-d7c6-4c62-aefa-597cce9c2e3f.png?resizew=150)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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|
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3卷引用:2023年山东省泰安市肥城市中考数学二模模拟试题
2023年山东省泰安市肥城市中考数学二模模拟试题2023年山东省泰安市肥城市中考二模数学模拟试题(已下线)专题11 最值问题 (2大易错点分析+26个易错点+易错题通关)-备战2024年中考数学考试易错题(江苏专用)
7 . 如图,
是等腰三角形,点
,
分别在腰
,
上,且
,连接
,
.求证:
.
![](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/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/024dc2ccbbe321774df5d44e8785b203.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/421291381be28da4bd16560fd383b4a9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/15/01df7c7a-e134-4a84-a500-97de95903366.png?resizew=112)
您最近一年使用:0次
8 . 如图,在边长为
的正方形
中,点
,
分别为
,
边上的点,将正方形
沿
翻折,点
的对应点为
,点
恰好落在
边的点
处.
如图①,连接
,则
与折痕
的位置关系是______,
与
的数量关系是______;
(2)【问题探究】
如图②,连接
,在翻折过程中,
平分
,试探究
的面积是否为定值,若为定值,请求出
的面积;若不是定值,请说明理由;
(3)【拓展延伸】若
,求出
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
如图①,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(2)【问题探究】
如图②,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e5f736b1195fef1d2d300168a795f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefb722769d1d5bce4b28ff8fc59a8ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bde5e96c203f387b2004b4abf5f839f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bde5e96c203f387b2004b4abf5f839f.png)
(3)【拓展延伸】若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a3cc8c48bf54ec8252e5dce6867754.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01a50d38bafed402dd8e92206891d467.png)
您最近一年使用:0次
2024-04-05更新
|
435次组卷
|
4卷引用:2023年贵州省贵阳市白云区初中学业水平考试数学模拟预测题
9 . 在等腰直角三角形
中,
,
,点
为直线
上一个动点,绕点
将射线
逆时针旋转
,交直线
于点
.
绕点
逆时针旋转
得到
,连接
,
,
,
,
又
,
,
.
请阅读上述过程,并完成以下问题:
(1)得出
的依据是______(填序号).
①
②
③
④![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5eb2decaa6be2df36a5e4b7fabf585d.png)
(2)在以上条件下,如图2,当点
在线段
的延长线上时,求证:
.
(3)在等边三角形
中,
,点
为射线
上一个动点,将射线
绕点
逆时针旋转
交直线
于点
,将
绕点
逆时针旋转
得到
,连接
,当
为直角三角形时,请直接写出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9524e3810e06dc781285f1289e75d653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d011d6ad89d0b033f96c2efbb314d78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2dca049735b45fb9b2533c68605eddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0823d7addcc733baeb98c181bb383fec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/884782796046ca51149c370aeac25a3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c162245c8ea36219495ae4b8b640a750.png)
又
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad531d18222c3a7274064a33fd9906b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71df207da4b07956b8ae8cd0a640fc18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eef7c80c6f50b064b2c2ff334c9bb13.png)
请阅读上述过程,并完成以下问题:
(1)得出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/546ebba737424c7e73c4fff54f01937e.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6720e36b02193db161c61d4017673760.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5a290f047f50481318d040c604d72f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9beb8b968744573e593ac28451c69729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5eb2decaa6be2df36a5e4b7fabf585d.png)
(2)在以上条件下,如图2,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/872788cb4c81767b75afbfe812de9c27.png)
(3)在等边三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9524e3810e06dc781285f1289e75d653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d011d6ad89d0b033f96c2efbb314d78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2dca049735b45fb9b2533c68605eddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf173f2377cc32d2a33d889729a224e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
您最近一年使用:0次
10 . 【问题引领】
问题1:如图①,在四边形
中,
,
,
.
、
分别是
,
上的点.且
.探究图中线段
,
,
之间的数量关系.
到点
.使
.连接
,先证明
,再证明
.他得出的正确结论是 .
【探究思考】
问题2:如图②,若将问题1的条件改为:四边形
中,
,
,
,问题1的结论是否仍然成立?请说明理由.
问题1:如图①,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a651eb577dbada1f29590e558d6f9fa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21eb847a1722ed6e10e23c59d53fe7d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b0382c28547d3834ca71f3f0677695.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11872bd228050e0af8764dfa77394341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc180eda08edfb6d54eb04da7741f099.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/889da09fe6ccd8792c41a67493de4ec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/978be825e9cde34dd46a92e4b502c04b.png)
【探究思考】
问题2:如图②,若将问题1的条件改为:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a651eb577dbada1f29590e558d6f9fa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4579332087ee585f1cae423a6ae1862.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e2187c12e6b3d482f74af8dbf2f904b.png)
您最近一年使用:0次
2024-04-05更新
|
152次组卷
|
2卷引用:2023年吉林省松原市扶余市二校中考第四次数学模拟预测试题