已知DA⊥AB,CA⊥AE,AB=AE,AC=AD 求证:DE=BC
![](https://img.xkw.com/dksih/QBM/2020/5/20/2466830356185088/2468001120706561/STEM/42dfa896-b229-4ba5-8691-b4e8beaf345f.png)
更新时间:2020-05-22 07:44:02
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【知识点】 用SAS直接证明三角形全等(SAS)解读
相似题推荐
解答题-证明题
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适中
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【推荐1】“倍长中线法”是解决几何问题的重要方法.所谓倍长中线法,就是将三角形的中线延长一倍,以便构造出全等三角形,具体做法是:如图,
是
的中线,延长
到
,使
,连接
,构造出
和
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ad98ad714864041a632ca949308e417.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07fbad473c16df3ff62c1c6b37de6aa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a4a514e2e338c6fa31c9938624a4a71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/440095115d64b74e4b1c30e402c178e1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/2/feeed0a9-9ca2-4ee5-a537-6f179fbaaf80.png?resizew=158)
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解答题-证明题
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适中
(0.65)
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【推荐2】如图,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/12840301-6daa-4a18-978e-e92b438d41bd.png?resizew=225)
(1)求证:
.
(2)图中
、
有怎样的关系?试证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea258cfffcd86185661ec134ccb71327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ead706ccc238d868654030a3626847c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/12840301-6daa-4a18-978e-e92b438d41bd.png?resizew=225)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe2c34a83631c3127ca5896e00cda297.png)
(2)图中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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