如图,
是
的对角线,点
,
在
上,连接
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7593b9797a9c6c35bc609f5d91ac887a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed619e2dc900c52a29012e5b821451bc.png)
更新时间:2024-05-03 17:29:13
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
【推荐1】如图:已知
,猜想
与
的位置关系,并写出合适的理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2f858ce9f56c8464b5bcbf7b4b2cba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐2】把下面的证明过程补充完整.
![](https://img.xkw.com/dksih/QBM/2021/5/29/2731071017951232/2768521050243072/STEM/838c5f51-2a87-4e9f-ae9f-d911195b0a2b.png?resizew=199)
已知:如图,
中,
于点G,
于点D,且
.
求证:
.
证明:
于点G,
于点D,(已知)
,
.(垂直定义)
.(等量代换)
.( ① )
.( ② )
又
,(已知)
.( ③ )
④ .
.( ⑤ )
![](https://img.xkw.com/dksih/QBM/2021/5/29/2731071017951232/2768521050243072/STEM/838c5f51-2a87-4e9f-ae9f-d911195b0a2b.png?resizew=199)
已知:如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaa106172cc7b3db22ebbcbc1fe84c04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3575fac382d25eef71830315b2481037.png)
证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f667340c7f0b2ccc59a63c90a8541d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1025cf069c844992a2635e99e4d6493c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42074af1b0909e9dba0c626ea131a770.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a807fd5750c3d5c2327f485e66a28972.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7ac665d41b1da45cbc57a166fcca00c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee36972f2f013c804cd1e249a6f55ed.png)
又
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c08980b6afedc04aa04f385791f0163.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c8b964761e7bda63fb8ca4efe24c16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c56ff61be898938b4e4ccdafc79e81a7.png)
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解答题-证明题
|
适中
(0.65)
【推荐1】如图,在
中,
,
.D 为
的中点,
于 E,过点C作
交
的延长线于点 F,连接
交
于点 G.
求证:
①
;
②
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd657e48b15b9b54a55817e2c26b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b00a5239269d72d6f9632e7d77347106.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/5fce504c-c602-474b-8a16-01048120b7a6.png?resizew=175)
求证:
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee933120ba15f6afe2b580938f121ce2.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94e8a6ed9efd3ab94d547e2209adc8eb.png)
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解答题-问答题
|
适中
(0.65)
名校
【推荐2】如图,在
中,
,
,延长AB至点D,连接CD,以CD为直角边作等腰直角三角形
,
,连接BE.试说明:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/3/f2d54a0b-7971-427b-b3b5-fa7fa61d11b0.png?resizew=151)
(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eba7e2cb2e2390673b83bde332973d6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/3/f2d54a0b-7971-427b-b3b5-fa7fa61d11b0.png?resizew=151)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c503e29373e8d87134bdb46bd3912910.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c897a54f2e36bc4b52fba74b41c89d2d.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,
中,过点B作
于E,F为
上一点,且
.
(1)求证:
;
(2)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b937442ad4cc480adc11bb143559454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be81ecfb5789115388a2f345da9406d1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/7/576ac5fc-0134-40a9-bb16-f3fc4bf4d7b6.png?resizew=217)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcea18a53cf84f38cb8122f8bfe934ef.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/188a574dbab500037c86df28f1935a7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
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解答题-作图题
|
适中
(0.65)
【推荐2】在等边
中,D,E,F分别是边AB,BC,CA上的动点,满足
,且
.作点E关于AC的对称点G,连接CG,DG.
![](https://img.xkw.com/dksih/QBM/2022/7/6/3016771607625728/3023747543261184/STEM/a3485682e99640ae934dbf0162752398.png?resizew=448)
(1)当点D,E,F在如图1所示的位置时,请在图1中补全图形,并证明四边形DBCG是平行四边形;
(2)当
,
时,求∠BDE的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fe6d389a6c448d92b79d89bc9e8489f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78e6219ce9770e9e048bfe015fb53346.png)
![](https://img.xkw.com/dksih/QBM/2022/7/6/3016771607625728/3023747543261184/STEM/a3485682e99640ae934dbf0162752398.png?resizew=448)
(1)当点D,E,F在如图1所示的位置时,请在图1中补全图形,并证明四边形DBCG是平行四边形;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ca4ac471d3fb5f7156c69a249f4f225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36f11400237c043dc9822dde349513d5.png)
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