用两个全等的直角三角形,拼下列图形,①平行四边形 ②矩形 ③菱形 ④正方形 ⑤等腰三角形 ⑥等边三角形,其中不一定能拼成的图形是 ( )
A.①②③ | B.②③ | C.③④⑤ | D.③④⑥ |
更新时间:2019-04-12 15:20:21
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【推荐1】如图,已知△ABC≌△EDF,点F,A,D在同一条直线上,AD是∠BAC的平分线,∠EDA=20°,∠F=60°,则∠DAC的度数是( )
![](https://img.xkw.com/dksih/QBM/2019/1/16/2119909694889984/2123645080199168/STEM/1d960a95e7404dc69b109828703cba57.png?resizew=117)
![](https://img.xkw.com/dksih/QBM/2019/1/16/2119909694889984/2123645080199168/STEM/1d960a95e7404dc69b109828703cba57.png?resizew=117)
A.50° | B.60° | C.100° | D.120° |
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【推荐2】如图,已知
平分
,
于
,
于
,且
.若
,
,
,
的长为( )
![](https://img.xkw.com/dksih/QBM/2019/4/15/2182961908867072/2183922695962624/STEM/859f4473961b40138eb07d592f6f03ed.png?resizew=169)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f913298f0fae9f55377a8deab9f099dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a16dc02090b6e9263555061f14fbc8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae002c63b493d2b1d72ced0f85537c51.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaeeec5029f06fbfca8acfa899dbe472.png)
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A.8 | B.8.5 | C.9 | D.7 |
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【推荐1】四边形
的对角线
,
相交于
,下列给出的结论中,在正方形中成立但在矩形中不成立的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](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)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】正方形ABCD在平面直角坐标系中的位置如下图所示点A的坐标为(0,3),点B的坐标为(2,4),则点D的对应点的坐标为( )
![](https://img.xkw.com/dksih/QBM/2022/9/26/3074947741859840/3086116905066496/STEM/25b69adf8e6b46d5a72ee838124f6b8a.png?resizew=134)
![](https://img.xkw.com/dksih/QBM/2022/9/26/3074947741859840/3086116905066496/STEM/25b69adf8e6b46d5a72ee838124f6b8a.png?resizew=134)
A.(1,1) | B.(3,-1) | C.(2,-3) | D.(1,-3) |
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