如图,在下列5×5的网格中,横、纵坐标均为整点的数叫做格点,例如A(0,1)、B(2,1)、C(3,3)都是格点,仅用无刻度的直尺在网格中做如下操作:
(1)直接写出点A关于点B旋转180°后对应点M的坐标 ;
(2)画出线段BE,使BE⊥AC,其中E是格点,并写出点E的坐标 ;
(3)找格点F,使∠EAF=∠CAB,画出△EAF,并写出点F的坐标 ;
(4)找格点D(D与B不重合),使S△ABC=S△ACD,直接写出格点D的坐标 .
(1)直接写出点A关于点B旋转180°后对应点M的坐标 ;
(2)画出线段BE,使BE⊥AC,其中E是格点,并写出点E的坐标 ;
(3)找格点F,使∠EAF=∠CAB,画出△EAF,并写出点F的坐标 ;
(4)找格点D(D与B不重合),使S△ABC=S△ACD,直接写出格点D的坐标 .
![](https://img.xkw.com/dksih/QBM/2020/3/11/2417122313904128/2417471617687552/STEM/d5611730374043208c066e1f69cab408.png?resizew=311)
更新时间:2020-03-11 22:21:30
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【推荐2】如图,四边形
是矩形,
,交
的延长线于点
,
,交
的延长线于点
,连接
.
求证:四边形
是菱形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/684d328b02462aa25a936d1c83eee4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb4ed367926376b17f6bef079644ea79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1507da3daed983c2f355d4caebb66d72.png)
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