如图,△ABC和△ADE都是等腰直角三角形,CE与BD相交于点M,BD交AC于点N.证明:
(1)△ABD≌△ACE
(2)BD⊥CE.
(1)△ABD≌△ACE
(2)BD⊥CE.
更新时间:2016-12-05 12:27:48
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相似题推荐
解答题-问答题
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适中
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【推荐1】在
中,点D、点E分别为边
上的点,
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/21e54aec-bd6c-40a0-858c-c8bca3caefd5.png?resizew=288)
(1)如图1,
平分
,
的垂直平分线经过点E与
延长线交于F点,连接
,若
,求
的大小;
(2)如图2,D为边
中点,连接
,过点B作
的平行线
交
延长线于点F.若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cdba2ac1a72eea482f5578843e00357.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/21e54aec-bd6c-40a0-858c-c8bca3caefd5.png?resizew=288)
(1)如图1,
![](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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d3c9ce32b721995f355eea411340e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7db0641078052bf1af17b4c5a01b9ccc.png)
(2)如图2,D为边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a070d38a2111fb9aecf990494877f6f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b36b2074d38a435a79e526c0f167d19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c76156a15888f1f6379a83e696a82061.png)
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解答题-证明题
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名校
【推荐2】如图,已知:在四边形ABCD中,
,
,点E是BC边上的一点,且AE=DC.
![](https://img.xkw.com/dksih/QBM/2022/3/4/2929001701072896/2932969618333696/STEM/e575171b6b7b4862a40e91b766a6883e.png?resizew=166)
(1)求证:
.
(2)求证:
.
(3)如果
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea115e3cd939ece96569007c532e83ab.png)
![](https://img.xkw.com/dksih/QBM/2022/3/4/2929001701072896/2932969618333696/STEM/e575171b6b7b4862a40e91b766a6883e.png?resizew=166)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b873be2ad8404932196f4aa104f40a44.png)
(3)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bdbf29c5834edb013920e3982b0f7eb.png)
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解题方法
【推荐1】我们新定义一种三角形:若一个三角形中存在两边的平方差等于第三边上高的平方,则称这个三角形为勾股高三角形,这两边交点为勾股顶点.
![](https://img.xkw.com/dksih/QBM/2021/2/1/2648597642600448/2649317788295168/STEM/6b7d3b48456f4dde91ac5eef25891b0d.png?resizew=259)
(1)特例感知
①等腰直角三角形_________勾股高三角形(请填写“是”或者“不是”);
②如图1,已知
为勾股高三角形,其中C为勾股顶点,
是
边上的高.若
,
,试求线段
的长度.
(2)深入探究
如图2,已知
为勾股高三角形,其中C为勾股顶点且
,
是
边上试探究线段
与
的数量关系,并给予证明;
![](https://img.xkw.com/dksih/QBM/2021/2/1/2648597642600448/2649317788295168/STEM/6b7d3b48456f4dde91ac5eef25891b0d.png?resizew=259)
(1)特例感知
①等腰直角三角形_________勾股高三角形(请填写“是”或者“不是”);
②如图1,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/af633abfe3cb03f1836db6c570a5bcc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)深入探究
如图2,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/594c9a8c6d789ada157beb3e6aeba799.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
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【推荐2】已知关于
的方程
.
(1)求证:无论
取何值,这个方程总有实数根;
(2)若等腰
的底边长
,另两边
、
恰好是这个方程的两个根,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/371700145e44e2b11e1aebc85335174b.png)
(1)求证:无论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若等腰
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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