名校
1 . 图1,在正方形
中,
,
为线段
上一点,连接
,过点
作
,交
于点
.将
沿
所在直线对折得到
,延长
交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/f5a2ba95-94d0-4be6-862c-de7f74387530.png?resizew=148)
(1)求证:
.
(2)若
,求
的长.
(3)如图2,延长
交
的延长线于点
,若
,记
的面积为
,求
与
之间的函数关系式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0cfc81f5df5b164223424a6b2370714.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d308e5a0882c149bcb0029198af9150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81efd8e471483f95c80f0be8e677da32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf6db7e3845eb40841290768df39bafc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/f5a2ba95-94d0-4be6-862c-de7f74387530.png?resizew=148)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cdc346d78b31a196d99e910b39469e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ccb146c1692528caaf5548752bcb5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
(3)如图2,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce2790947716b1cfa9c5e7a65db4093.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eb58cb366a5ee4dd8f078311d80103b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b488898c6eaacbb0035a239decae6113.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/6afc03f3-f933-4f91-a40b-59ba83c3fdfc.png?resizew=144)
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2021-01-07更新
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