已知,如图,在平行四边形
中,E、F分别是
的中点.求证:
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba48366317ebea1c9dd5e4e67e03092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d99bb3ab66b8884bf23cffe1bddcb33.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92034dd2bb9480b18709d01153467f8f.png)
更新时间:2024-05-22 14:33:52
|
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解答题-证明题
|
较易
(0.85)
【推荐1】如图,点E在CD上,BC与AE交于点F,AB=CB,BE=BD,∠1=∠2.
求证:∠2=∠3.
求证:∠2=∠3.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/46857789-6273-482d-a11c-12eaf7f25129.png?resizew=182)
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解答题-证明题
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较易
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【推荐2】已知,如图:在△ABC中,∠B=2∠C,AD⊥BC,求证:AB=CD-BD.
![](https://img.xkw.com/dksih/QBM/2021/6/10/2739997196132352/2740697149726720/STEM/dc1d6317-1e22-485d-8fb4-06a86c2a18dd.png)
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解答题-证明题
|
较易
(0.85)
【推荐1】如图,在
中,点
是
延长线上的一点,
与
交于点
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/b2b66c50-ba55-49c5-b0d4-2e33ae7394e4.png?resizew=159)
(1)求证:
;
(2)若
的面积为
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81986efd8301a22407e407184420ad01.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/b2b66c50-ba55-49c5-b0d4-2e33ae7394e4.png?resizew=159)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a681d7667f6d68675d70201983793519.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
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解答题-证明题
|
较易
(0.85)
【推荐2】已知:如图,在平行四边形
中,点E为线段
延长线上一点,连接
交
于点F,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/b1705226-f4fa-4953-8f4e-a80cb865fdbf.png?resizew=128)
(1)求证
;
(2)连接
,当
时,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed4f3c194ab9530fd7f7f53ddabb64a5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/b1705226-f4fa-4953-8f4e-a80cb865fdbf.png?resizew=128)
(1)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d87838d2f8487f1567667efa764ae3f.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/320e807a01bae6b8932e9744548969f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d31fa062eee48c6bbe6b6dcecf06615.png)
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