如图,边长为
的正方形
中,点
在边
上,且
,连接
.
![](https://img.xkw.com/dksih/QBM/2023/6/29/3270140127109120/3275070293098496/STEM/3dbc0fa8529b4c96bd4a0efbcfbbf614.png?resizew=165)
(1)求证
;
(2)若
平分
,试求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f190b17530d81d927c358ac84757a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374fe9986ebbc986fc422e514ab93a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f49d1de7c6dfc04b6e84e23eec0a1d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/2023/6/29/3270140127109120/3275070293098496/STEM/3dbc0fa8529b4c96bd4a0efbcfbbf614.png?resizew=165)
(1)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04f8eebda19eded2b059774a8c2666c3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
更新时间:2023-07-06 14:10:28
|
相似题推荐
解答题-作图题
|
适中
(0.65)
【推荐1】如图,△ABC为任意三角形
(1)试用直尺圆规在原图上作出BC边上的中线AD;
(2)求证:点B,点C到AD所在直线的距离相等.
![](https://img.xkw.com/dksih/QBM/2019/10/23/2318135231037440/2320426949607424/STEM/d9158b5fc7db4a95b6d62fc3626f2b13.png?resizew=263)
(1)试用直尺圆规在原图上作出BC边上的中线AD;
(2)求证:点B,点C到AD所在直线的距离相等.
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解答题-作图题
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适中
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名校
【推荐2】如图,
中,
厘米,现有两点M、N分别从点A、点B同时出发,沿三角形的边运动,已知点M的速度为1厘米/秒,点N的速度为2厘米/秒.当点N第一次到达B点时,M、N同时停止运动.设点M、N运动时间为t秒.
(1)当点M、N运动__________秒时,可得到等边三角形
:
(2)当点M、N运动__________秒时,M、N两点重合;
(3)请在备用图里画出图形解答:当点M、N在
边上运动时,是否存在以
为底边的等腰三角形
?若存在,请求出此时t的值.若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af59bb4a0561934cde8e465b5a6e14b7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/19/fa32e434-b468-49ac-bcef-acb8edff9eeb.png?resizew=318)
(1)当点M、N运动__________秒时,可得到等边三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
(2)当点M、N运动__________秒时,M、N两点重合;
(3)请在备用图里画出图形解答:当点M、N在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1885efcff0b903e314057dd153578600.png)
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解答题-问答题
|
适中
(0.65)
【推荐1】如图,已知
,
,
,
,
.
(1)求
的长度;
(2)求四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02b6d19fedaf8488f9637cd64efbca83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1d6ab945b1db15ded2c950017bdef19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a1038745c0d8bbf2cb2c007cdd6b0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4d3f03981196601c3b0510f3180623a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bee08e946bca2611b0ed8a358555d7a.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)求四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2019/3/20/2164572482273280/2164664817942528/STEM/e193abaf61714c49ba043ea3a9e7292f.png?resizew=156)
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解答题-证明题
|
适中
(0.65)
【推荐2】如图,将矩形纸片
折叠,使点C刚好落在线段
上,且折痕分别与边
、
相交,设折叠后点C、D的对应点分别为点G、H,折痕分别与边
、
相交于点E、F.
的形状,并证明你的结论.
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/561343fb8084dfe54add50ee88d7517f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/920ae90193d50ae60beafae6f2b4ebcd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a21244db4b83f2f442d3231fb2f74ca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在正方形
中,E是
的中点,在
延长线上取点F,使
,过点F作
交
于点M,交
于点G,交
于点N,连接
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/29/8f0e19bd-b256-4b6f-bad9-1f448cabf946.png?resizew=209)
(1)求证:
;
(2)若正方形
的边长为2.
①求
的值;
②求四边形
的面积.
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4d3d4307b9f64d8c99f864941f37874.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c2819babeef6f79d9bd34e6fe13c94b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4c865445dda4a59b6d5cb18fd74404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/29/8f0e19bd-b256-4b6f-bad9-1f448cabf946.png?resizew=209)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/174d490f4533d5b3c4e8d656e4695c6a.png)
(2)若正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1776a0542a690a63b6bd648062c429b.png)
②求四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cce78e47682115de4a86094e1aa29463.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】如图(1),四边形
是正方形,
分别是
和
的延长线上的点,且
,连接
,
,
.
(1)求证:
;
(2)若
,
,求
的面积;
(3)如图(2),若点
是
中点,点
是线段
上的动点,连接
,点
是线段
上的动点,
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a373959bb9026f8a09845c0b828bf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86d1125b47dec1c5e93143ee59ad862a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/10/d1669d02-e808-4aa6-a71f-9965f9463b82.png?resizew=301)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f537517f5240b716091c1a325a4caa67.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377b5f7197e5bd1afeea4d931307956a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
(3)如图(2),若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a35bea3712ddc07d3920a1ed63ff11a.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图,
是正方形
内一点,将
绕点
顺时针方向旋转
得到
.
(1)观察猜想:如图1,线段
与
的数量关系是 ,位置关系是 .
(2)探究实践:如图2,连接
,若
,
,
,求
.
(3)拓展延伸:如图3,把
绕点
在平面内自由旋转,若
,
,当
,
,
三点在一条直线上时,请直接写出
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0719ae600f0efeeaba659bb54e2edc6e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/12/121cb07c-c5b8-45c7-9d8e-1b5c47ff08a2.png?resizew=305)
(1)观察猜想:如图1,线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80672dda9430cb42b3136bcb1b67bbad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3730e2fa70360e60286cff11b37c3051.png)
(2)探究实践:如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d260c4df7b0dc180af6980d21f3371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc532cfe64300cb3da9e04a307c957a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8825d400f453c5c17a7beeb1cc9a9cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be41b05e11ba5eadaaed9a224b949774.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
(3)拓展延伸:如图3,把
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13af018556f0b484ed38519f2edc791c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59fe75f967e8915c9124a5d4ac420a4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b4e8625ce7de5c831e15e678c763a77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebbc9c4e4db6374d5ba4c5dec8747442.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】正方形ABCD的边长是5,点M是直线AD上一点,连接BM,将线段BM绕点M逆时针旋转90°得到线段ME,在直线AB上取点F,使AF=AM,且点F与点E在AD同侧,连接EF,DF.
![](https://img.xkw.com/dksih/QBM/2021/3/31/2689609662799872/2694962968051712/STEM/6f25afb99b774050b07c7e8e70e68f9a.png?resizew=265)
(1)如图1,当点M在DA延长线上时,求证:△ADF≌△ABM;
(2)如图2,当点M在线段AD上时,四边形DFEM是否还是平行四边形,说明理由;
(3)在(2)的条件下,线段AM与线段AD有什么数量关系时,四边形DFEM的面积最大?并求出这个面积的最大值.
![](https://img.xkw.com/dksih/QBM/2021/3/31/2689609662799872/2694962968051712/STEM/6f25afb99b774050b07c7e8e70e68f9a.png?resizew=265)
(1)如图1,当点M在DA延长线上时,求证:△ADF≌△ABM;
(2)如图2,当点M在线段AD上时,四边形DFEM是否还是平行四边形,说明理由;
(3)在(2)的条件下,线段AM与线段AD有什么数量关系时,四边形DFEM的面积最大?并求出这个面积的最大值.
您最近一年使用:0次