如图,将矩形
沿
折叠,使点D落在
边的点E处,过点E作
交
于点G,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/12/81614b11-8056-4a42-8bac-a6c5562c3ebc.png?resizew=136)
(1)求证:四边形
是菱形.
(2)试证明
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd7eb5fb41884fc7b27f2f2c6ef1ea4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/12/81614b11-8056-4a42-8bac-a6c5562c3ebc.png?resizew=136)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b0d543096590fc939259a0ee74d1067.png)
(2)试证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/732d6ee770d2d4dddfa11af5cddf759f.png)
更新时间:2024-01-12 09:28:14
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相似题推荐
解答题-证明题
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【推荐1】如图,将矩形ABCD沿对角线AC翻折,点B落在点E处,EC交AD于F.
![](https://img.xkw.com/dksih/QBM/2019/5/16/2205023308324864/2207248275488768/STEM/dbc1a6c393734792b9eff308985289be.png?resizew=141)
(1)求证:△AFEC≌△CDE;(2)若AB=3,BC=6,求图中阴影部分的面积.
![](https://img.xkw.com/dksih/QBM/2019/5/16/2205023308324864/2207248275488768/STEM/dbc1a6c393734792b9eff308985289be.png?resizew=141)
(1)求证:△AFEC≌△CDE;(2)若AB=3,BC=6,求图中阴影部分的面积.
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【推荐2】如图,已知矩形
,点E为
的中点,将
沿直线
折叠,点B落在
点处,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/20/1e481471-42c5-4dc0-a8aa-76ef4ee5d4f0.png?resizew=189)
(1)求证:
.
(2)若
,
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/020ebe1219437129358b986eb9e70bbf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/20/1e481471-42c5-4dc0-a8aa-76ef4ee5d4f0.png?resizew=189)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbe4e66dadb1f7b1a21a82cb31ecfab6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b939af5ba06e279cce39396aaf0fae06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/020ebe1219437129358b986eb9e70bbf.png)
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解答题-证明题
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【推荐1】如图,在菱形
中,
,点
在对角线
上,将线段
绕点
顺时针旋转角
,得到
,连接
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/6e41c735-921a-40bc-9366-253a914a64ca.png?resizew=235)
(1)求证:
;
(2)连接
,若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/597ce705d3a2fe04d29de9e81ec6250d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/6e41c735-921a-40bc-9366-253a914a64ca.png?resizew=235)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c581dab991aeadf06d972e47673ea8.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d858c6d8eaa15e7b2a36c8be0e930c28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686171942bd7698035016c732db43b63.png)
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【推荐2】如图①,在正方形
中,P是对角线
上的一点,点E在
的延长线上,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa4144f6ce108867d237f6891b4f4954.png)
(1)求证
;
(2)把正方形
改为菱形,其他条件不变(如图②),若
,求
的度数
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa4144f6ce108867d237f6891b4f4954.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/18/25ff113d-e349-4760-be4e-0fa71ea1a60d.png?resizew=340)
(1)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7115c444f00e7d3f88610a71844bf7e4.png)
(2)把正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ec329dd6bb3995edec573485b04611.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2b669a87f18866b2e9560f7fe1776d.png)
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解答题-证明题
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【推荐1】如图,在矩形
中,对角线
交于点O,分别过点
作
的平行线交于点E,连接
交
于点F.
是菱形;
(2)若
,求菱形
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/504b434a5d06fa23809a709fa42da886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5a6e2ab0a2c893dc495df33e5ee092d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/766318ce283b5cfccccd38a3736243cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5a6e2ab0a2c893dc495df33e5ee092d.png)
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【推荐2】如图,AC,BD为平行四边形ABCD的对角线,点E是AC上一点,点F在BE延长线上,且
,EF与CD交于点G,连结DF.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/15/55d22d46-6ba5-4954-bfc6-d58ebbc01b15.png?resizew=228)
(1)求证:
.
(2)连结DE,CF,若
,且G恰好是CD的中点,求证:四边形CFDE是菱形.
(3)在(2)的条件下,若四边形CFDE是正方形,且
,求BC的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08cbd1d4bdcf1199ec44f9ba5348ac42.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/15/55d22d46-6ba5-4954-bfc6-d58ebbc01b15.png?resizew=228)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b3f839ce88bf970aceb44ab939bd5b.png)
(2)连结DE,CF,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ed1321e4081133b1a8bbe994ecac48a.png)
(3)在(2)的条件下,若四边形CFDE是正方形,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
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解答题-问答题
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【推荐1】已知:如图在Rt△ABC中,斜边AB=5厘米,BC=
厘米,AC=b厘米,
>b,且
、b是方程
的两根.
⑴ 求
和b的值;
⑵
与
开始时完全重合,然后让
固定不动,将
以1厘米/秒的速度沿
所在的直线向左移动.
求y与x之间的函数关系式,并写出x的取值范围;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1deee72bceaa54534cf6735ca610159c.png)
⑴ 求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
⑵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a71399ec88d4a3bd807e23bef04dce6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a71399ec88d4a3bd807e23bef04dce6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
① 设x秒后与
的重叠部分的面积为y平方厘米,
求y与x之间的函数关系式,并写出x的取值范围;
② 几秒后重叠部分的面积等于平方厘米?
![](https://img.xkw.com/dksih/QBM/2018/10/29/2064318705647616/2067147255783424/STEM/10f84024af8e4558b8e46993a97c40df.png?resizew=156)
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【推荐2】如图,在平面直角坐标系中,直线y=
x+1与x轴交于点A,与y轴交于点C,点B (4,3)是直线上的一点.
(1)求A点和C点的坐标.
(2)已知x轴上一动点P(m,0),连接BP,若△ABP与△AOC相似,求m的值.
(3)设直线x=
与BC交于点M,点N是直线x=
上任意一点,且点M 与点N不重合,是否存在点N,使得以M、B、N为顶点的三角形与△AOC相似.若存在,请直接写出N点的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)求A点和C点的坐标.
(2)已知x轴上一动点P(m,0),连接BP,若△ABP与△AOC相似,求m的值.
(3)设直线x=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caa585b9257ed0798213a9ae9b87d291.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caa585b9257ed0798213a9ae9b87d291.png)
![](https://img.xkw.com/dksih/QBM/2021/11/25/2858782950957056/2860295926071296/STEM/af30af52-bfa9-4072-9ab4-a7f5efaf1887.png?resizew=469)
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