1 . 中华文明,源远流长;中华汉字,寓意深广.下列四个选项中,是轴对称图形的为( )
A.爱 | B.国 | C.敬 | D.业 |
您最近一年使用:0次
名校
2 . 2024年5月5日至10日,习近平主席的欧洲三国之行,彰显了我国大国领袖的全球视野、天下情怀和时代担当.下列国际组织的图标中,是轴对称图形的是( )
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
真题
3 . 【问题情境】
(1)如图1,圆与大正方形的各边都相切,小正方形是圆的内接正方形,那么大正方形面积是小正方形面积的几倍?小昕将小正方形绕圆心旋转45°(如图2),这时候就容易发现大正方形面积是小正方形面积的__________倍.由此可见,图形变化是解决问题的有效策略;
(2)如图3,图①是一个对角线互相垂直的四边形,四边a、b、c、d之间存在某种数量关系.小昕按所示步骤进行操作,并将最终图形抽象成图4.请你结合整个变化过程,直接写出图4中以矩形内一点P为端点的四条线段之间的数量关系;
(3)如图5,在图3中“④”的基础上,小昕将
绕点
逆时针旋转,他发现旋转过程中
存在最大值.若
,
,当
最大时,求AD的长;
中,
,点D、E分别在边AC和BC上,连接DE、AE、BD.若
,
,求
的最小值.
(1)如图1,圆与大正方形的各边都相切,小正方形是圆的内接正方形,那么大正方形面积是小正方形面积的几倍?小昕将小正方形绕圆心旋转45°(如图2),这时候就容易发现大正方形面积是小正方形面积的__________倍.由此可见,图形变化是解决问题的有效策略;
(2)如图3,图①是一个对角线互相垂直的四边形,四边a、b、c、d之间存在某种数量关系.小昕按所示步骤进行操作,并将最终图形抽象成图4.请你结合整个变化过程,直接写出图4中以矩形内一点P为端点的四条线段之间的数量关系;
(3)如图5,在图3中“④”的基础上,小昕将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36aae82d53f2a35d2f95f467bd5b76cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ea98cd15fa4c868eb83ca260c6d9ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6514b9e0ab0e94b9ee5a479134c84ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77766d07f586e5d23b9d9eb1e3eb2f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ea98cd15fa4c868eb83ca260c6d9ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a223cc0233b0818eb10b0e6616ed007d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b95d6d708447619b303a1b3ec3a2d14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866eb1d82952dee5b8a229b8874b7bcb.png)
您最近一年使用:0次
4 . 如图,正方形
的边长为
,点
在
边上且
,点
是
上一动点,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4fdb5421b7ccd0b89dd3943e5809765.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/484155b48555fe7e39be4d34c0639763.png)
您最近一年使用:0次
5 . 如图,
与
关于直线
对称.
与
的交点
在直线
上.
与
的对称点;
(2)指出
与
中相等的线段和角;
(3)图中还有能形成轴对称的两个三角形吗?
![](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/411461db15ee8086332c531e086c40c7.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
(2)指出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
(3)图中还有能形成轴对称的两个三角形吗?
您最近一年使用:0次
6 . 一次函数
,
为常数,且
的图象和反比例函数
为常数,
的图象交于点
和点
.
(1)求
的值及一次函数的表达式.
(2)点
为反比例函数图象上一点,点
关于
轴的对称点再向下平移4个单位得到点
,点
恰好落在反比例函数图象上,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9b863b17b41888b043f46d8ed07c1f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/103b6ff65be79b98e05c368ddcae533c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274c4cac8844be3afac15c71d56cf3b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e464a3586f84fcdf7d221619f8018144.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e555db9f2598828e647f618b858c8d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/292dd14f24b8392e499c328c1ca82f9b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(2)点
![](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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
您最近一年使用:0次
昨日更新
|
106次组卷
|
2卷引用:2024年浙江省杭州市滨江区九年级中考数学一模试题
7 . 如图,
为半圆直径,
,点C为半圆上一点,点D和点B关于直线
对称,连接
交
于点E,连接
.设
,则y关于x的函数关系式为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667349d99185bb045030b733352ff7fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f16b804ba9ccbc9a070f33734b5c1e9.png)
您最近一年使用:0次
8 . 如图,
中,
,
,
是
边上一动点,连接
,将
沿
翻折后得到
,射线
与射线
相交于点
.
是直角三角形,求
的度数;
(2)若
中有两个角相等,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5056f7da8511e92ab4e22e9c3be601b6.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172f1b400d9ddec4ea01f6fd040b3802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a037b1a3ec2e37bbcb05d0a467efb511.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34dbf33492e5223df78dea34a24ae015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34dbf33492e5223df78dea34a24ae015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
您最近一年使用:0次
9 . 折纸是一门古老而有趣的艺术,如图,已知长方形纸带
,将纸带沿
折叠后,点
,
分别落在点
,
的位置,
在
上,再沿
折叠,点
落在点
位置,点
在
上,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/494ba20b1444f524cf636961e4688ae8.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5326817f9af012432a202749d1df59f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9362f7a7911429349df9ae90591db47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9362f7a7911429349df9ae90591db47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a83ccde054ec5f3473ede6c07e484290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/494ba20b1444f524cf636961e4688ae8.png)
您最近一年使用:0次
10 . 如图, 在菱形
中, 点E为
的中点, 将菱形
沿
翻折, 使点 C落在
上的点 F 处. 若
, 则折痕
的长为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
您最近一年使用:0次