已知:如图,AD是△ABC的高,E是AD上一点,BE的延长线交AC于点F,BE=AC,DE=DC,BE和AC垂直吗?说明理由.
![](https://img.xkw.com/dksih/QBM/2018/2/12/1880555359191040/1881048565112832/STEM/0297098f42b84f5ca98a6cf869850476.png?resizew=176)
更新时间:2018-02-13 01:06:00
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【知识点】 全等三角形综合问题
相似题推荐
解答题-证明题
|
适中
(0.65)
名校
【推荐1】已知在
中,
,且
=
.作
,使得
.
(1)如图1,若
与
互余,则
=______(用含
的代数式表示);
(2)如图2,若
与
互补,过点C作
于点H,求证:
;
(3)若
与
的面积相等,则
与
满足什么关系?请直接写出你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212bfbd5575772ca36d6fc3e7b246e49.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/27/4738a823-648b-4239-b436-b8e3d49c345f.png?resizew=310)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3702b5620dbee356a8e560c78d223ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6f86d9ca130443b8effd507f50364c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/171b164ca116a4957be693f8cda5c412.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
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解答题-作图题
|
适中
(0.65)
【推荐2】图①,图②均是
的正方形网格,每个小正方形的顶点称为格点,小正方形的边长为1,点A,点B,点D,点E均在格点上,在给定的网格中按要求画图,所画图形的顶点均在格点上.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/18/dc464f94-abe7-43de-b815-8f1de0fd43b5.png?resizew=171)
(1)在图①中画出以
为斜边的等腰直角
,使点C在格点上;
(2)在图②中画出以
为斜边的直角
,使点F在格点上,且
和
不全等,再在
上找点P,使得
最短.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fb9d60d456560e9bac66c8b20c49bb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/18/dc464f94-abe7-43de-b815-8f1de0fd43b5.png?resizew=171)
(1)在图①中画出以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)在图②中画出以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
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