如图,在平行四边形
中,点
、
分别在边
和
上,且
.
;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92034dd2bb9480b18709d01153467f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d99bb3ab66b8884bf23cffe1bddcb33.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
更新时间:2023-08-01 21:05:25
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解答题-作图题
|
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(0.85)
名校
【推荐1】如图,在正方形
中,点
是边
上的定点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/11/f5713372-8cd1-4895-90a4-88e5afce04ff.png?resizew=264)
(1)如图1中仅用圆规分别在
、
上作点
、
,使
,且
,保留作图痕迹 ,不写作法 ;
(2)根据你的作图步骤,利用图2证明:
,且
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/11/f5713372-8cd1-4895-90a4-88e5afce04ff.png?resizew=264)
(1)如图1中仅用圆规分别在
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee874c129eca8bf7edb50daa0f17d605.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f90d9f505c3094e8314689fc631c6ce.png)
(2)根据你的作图步骤,利用图2证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee874c129eca8bf7edb50daa0f17d605.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f90d9f505c3094e8314689fc631c6ce.png)
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解答题-证明题
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较易
(0.85)
【推荐1】如图,已知在 ABCD中,对角线AC,BD交于点O,AC⊥AB,E,F分别在线段OD,OB上,且OE=OF,连结CE,AF
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/14/2fc4fe3d-6ed7-4a1d-972c-19282a904200.png?resizew=118)
(1)求证:CE=AF;
(2)若∠DBA=45°,AB=1,求直线AD与BC之间的距离.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/14/2fc4fe3d-6ed7-4a1d-972c-19282a904200.png?resizew=118)
(1)求证:CE=AF;
(2)若∠DBA=45°,AB=1,求直线AD与BC之间的距离.
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解答题-证明题
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【推荐2】如图,平行四边形ABCD中,分别过A,C两点作AE⊥BD,CF⊥BD,垂足分别为E、F,连接CE、AF.
(1)求证:BE=DF;
(2)若AB=4,EF=2,∠AFE=45°,求△ABD的面积.
(1)求证:BE=DF;
(2)若AB=4,EF=2,∠AFE=45°,求△ABD的面积.
![](https://img.xkw.com/dksih/QBM/2021/8/14/2785747470614528/2795963681193984/STEM/359bbbbb9db3468a91a6dbdd971b2a3e.png?resizew=219)
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