已知:三角形
中,
,证明:
.(取边BC中点D,连接AD)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4354365ca0929f8a606ed0bf341e4ca.png)
更新时间:2021-10-04 14:57:23
|
【知识点】 用SSS直接证明三角形全等(SSS)解读
相似题推荐
解答题-问答题
|
容易
(0.94)
【推荐1】如图:AB=AD,CB=CD.△ABC与△ADC全等吗?为什么?
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/98762e93-1862-4d4f-94ad-98f2496db931.png?resizew=117)
您最近一年使用:0次
解答题-证明题
|
容易
(0.94)
【推荐2】如图,
和
相交于点
,并且
,
.
![](https://img.xkw.com/dksih/QBM/2020/2/15/2399463955038208/2399607626522624/STEM/24413ad110f746dfb12599aefc8230eb.png?resizew=175)
(1)求证:
.
证明思路现在有以下两种:
思路一:把
和
看成两个三角形的边,用三角形全等证明,即用
_____
______证明;
思路二:把
和
看成一个三角形的边,用等角对等边证明,即用
____
____证明;
(2)选择(1)题中的思路一或思路二证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfb27272b4eb9ed057dd3b4d40697e7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc6cfc2eafb07d6f690da4d5ca5a754.png)
![](https://img.xkw.com/dksih/QBM/2020/2/15/2399463955038208/2399607626522624/STEM/24413ad110f746dfb12599aefc8230eb.png?resizew=175)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c8dbc31b2e14067ef2f34b4e25f114.png)
证明思路现在有以下两种:
思路一:把
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6595597d25112f247753397d25bf5080.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad9a6f031e87ed04e869bf1b223bd8c2.png)
思路二:把
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/665ffcdb7c57534dc184cc840471f2f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f617fa80f09fc245909492f5335ea5c.png)
(2)选择(1)题中的思路一或思路二证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c8dbc31b2e14067ef2f34b4e25f114.png)
您最近一年使用:0次