如图,在矩形
中,P是对角线
上一点,过点P作
交
于点E,作
交
于点F.
![](https://img.xkw.com/dksih/QBM/2022/12/29/3141076887191552/3144186321526784/STEM/aadac39a57c64ce791f781bd8db40178.png?resizew=163)
(1)证明:
;
(2)已知
,当四边形
是正方形时,求此正方形的边长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5edc9b272f595fa746a1bfa1f2d4898.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e3ccb0e85c18f5c94e77670787f45e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2022/12/29/3141076887191552/3144186321526784/STEM/aadac39a57c64ce791f781bd8db40178.png?resizew=163)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dc42ad7465ff9e4b0019bbc1b877bb4.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/647984d1c13f1c832f4307db0dfc10ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fce76109c3b574feaca9cd7029c2875.png)
更新时间:2023-01-02 16:06:21
|
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【推荐1】如图①②,
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(2)在图②中,
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(1)在图①中,
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(2)在图②中,
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【推荐2】(1)如图1,已知AB∥CD,∠ABC=60°,可得∠BCD= 度;
(2)如图2,在(1)的条件下,如果CM平分∠BCD,则∠BCM= 度;
(3)如图3,在(1)(2)的条件下,如果CN⊥CM,则∠BCN= 度;
(4)尝试解决下面问题:如图4,AB∥CD,∠B=40°,CN是∠BCE的平分线,CN⊥CM,求∠BCM的度数.
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(4)尝试解决下面问题:如图4,AB∥CD,∠B=40°,CN是∠BCE的平分线,CN⊥CM,求∠BCM的度数.
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【推荐1】已知,矩形在平面直角坐标系中的位置如图所示,点C在x轴的正半轴上,点A在y轴的正半轴上,已知点B坐标为
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【推荐2】如图,在平行四边形ABCD中,EF是直线DB上的两点,DE=BF.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/5/a040f1d6-314d-4468-b3d2-fc0b2a51c8f6.png?resizew=317)
(1)求证:四边形AFCE是平行四边形;
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【推荐1】如图,直线
与
轴、
轴分别相交于点
、点
,以线段
为边在第一象限作正方形
.反比例函数
在第一象限内的图象经过点
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![](https://img.xkw.com/dksih/QBM/2021/6/25/2750579279757312/2752105170976768/STEM/675e4a01-2b0c-44b1-b6ab-340dd7bfe589.png)
(1)求反比例函数的解析式;
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沿
轴向上平移几个单位能使点
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4de869ae6b6dc5b79fcae3de540b30bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b0b612460326448de36e160c8d29af9.png)
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(1)求反比例函数的解析式;
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【推荐2】如图,点G是正方形
对角线
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和
相交于点H.
(1)求证:
;
(2)判断
与
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(3)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/21/914c03f7-9f43-4dfd-a54d-71b212d15b2f.jpg?resizew=158)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9417a225e219fbccae8c565e3541c0c.png)
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce8f887360a533f0a25b0b34fb11f0a1.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7095e61966d5128797bcfea5336e0e1.png)
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【推荐1】如图,矩形ABCD中,AB=20,BC=10,点P为AB边上一动点,DP交AC于点Q.
(1)求证:△APQ∽△CDQ;
(2)P点从A点出发沿AB边以每秒1个单位长度的速度向B点移动,移动时间为t秒.当t为何值时,DP⊥AC?
(1)求证:△APQ∽△CDQ;
(2)P点从A点出发沿AB边以每秒1个单位长度的速度向B点移动,移动时间为t秒.当t为何值时,DP⊥AC?
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/b439c86a-4372-4eca-8fa2-1aac805ced8b.png?resizew=132)
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【推荐2】如图,在矩形ABCD中,AB=6,∠BAC=30°,点E在CD边上.
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(1)若AE=4,求梯形ABCE的面积;
(2)若点F在AC上,且∠BFA=∠CEA,求
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(1)若AE=4,求梯形ABCE的面积;
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