如图,
中,
分别在四条边上.
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2019/7/15/2247261698293760/2248633744703488/STEM/6c7fe1fa39ff4eb5a62f99244be56d8b.png?resizew=210)
(1)写出图中的相似三角形,并证明.
(2)当
,
时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42c2d86d8daea5e652d99fe1c6bc3f9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8675b1f836681090a356709ac4ebac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d96a5d40d0aea9f4398ca4d0fe9b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11fc7b0e514bbe36125c5591d3aca0d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1165e9463a29ddc2e3c98708c0910660.png)
![](https://img.xkw.com/dksih/QBM/2019/7/15/2247261698293760/2248633744703488/STEM/6c7fe1fa39ff4eb5a62f99244be56d8b.png?resizew=210)
(1)写出图中的相似三角形,并证明.
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60634341a9603e24b2bbc6960abe3d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8001664c8cd0ed9752309b100b4bfb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
更新时间:2019-07-17 09:19:58
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【推荐1】如图,已知平行四边形
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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解答题-问答题
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容易
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【推荐2】在▱ABCD中,∠A=48°,BC=3cm,求∠B,∠C的度数及AD边的长度.
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【推荐1】如图,在边长为1个单位长度的小正方形组成的
网格中,
的顶点均在格点上,直线
经过
两点.
是一个轴对称图形,其对称轴为直线
,请将四边形
补充完整;
(2)将
缩小后得到
(点
均在格点上),则
与
的比值为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23f3b42cd6069f0e461035e76459ee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d100e7830d2e9d27bdccb181c79b65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb0628cecbfc98d390e5447d52414e8.png)
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解答题-证明题
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名校
【推荐2】如图,A、B、C三点均在边长为1的小正方形网格的格点上.
(2)试证明上述结论:△ABD∽△CBA.
(2)试证明上述结论:△ABD∽△CBA.
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