如图,P是正方形ABCD的边BC上的一个动点(P与B、C不重合)连接AP,过点B作
交CD于E,将
沿BE所在直线翻折得到
,延长
交BA的延长长线于点F.
(1)探究AP与BE的数量关系,并证明你的结论;
(2)当AB=3,BP=2PC时,求EF的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f75139b83eee3bb961eea53d167098.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1a2dbe2665ec6a0fadff8e19da12f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f640a822f3410f75cda7b8ea4ee05376.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7752aa0b8a01afc2fa4e44212cc9333b.png)
(1)探究AP与BE的数量关系,并证明你的结论;
(2)当AB=3,BP=2PC时,求EF的长.
![](https://img.xkw.com/dksih/QBM/2020/10/6/2565374538735616/2566583736221696/STEM/e2e2e869837d46eeb9e8956189ad6523.png?resizew=212)
更新时间:2020-10-08 14:30:53
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【推荐1】如图,
中,
,
,
,若动点P从点C开始,按C→A→B→C的路径运动,且速度为每秒
,设出发的时间为t秒.回答下列问题:
(1)当t=______秒时,
平分
;
(2)在运动过程中是否能出现以
为腰的等腰三角形
?若能,求出此时点P运动时间;若不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1cd4a1c8087ef697d82b321a3331211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c545764505bb00578a870c5e39493a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78d0ab561d0c9bb9099772c596af8bf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/20/67c8085f-c407-4bb3-90fa-351c3c84e394.png?resizew=152)
(1)当t=______秒时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
(2)在运动过程中是否能出现以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/357265c532428e886a643e8e653eec9e.png)
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【推荐2】如图,
与
相交于点
,连接
、
并延长,相交于点
,连接
、
,
,
,
.求证:
垂直平分
.
![](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/1dde8112e8eb968fd042418dd632759e.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a23f35ebcd9799d82c1e41c09781a4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1393308bc68322f50fa29702dd412263.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba11242dcc61d3c7c3555b598b5fdc89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/2022/11/14/3109604876197888/3124436882890752/STEM/329dfb9925654b9590d0cba7c8868d3f.png?resizew=115)
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【推荐1】如图,斜坡OM的坡角
,在坡面B处有一棵树
,小彭在坡底
处测得树稍A的仰角为45°,沿坡面OM上行30米到达D处,测得
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/70824ce4-faec-4d72-8052-7ee227e19027.png?resizew=199)
(1)求
的长;
(2)求树
的高度(结果保留根号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9b0eb72986587ffecf87c22a224bcd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9228b213dc6b256b752b38a466ebec93.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/70824ce4-faec-4d72-8052-7ee227e19027.png?resizew=199)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
(2)求树
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
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【推荐2】如图,等腰
中,
,
,
是
的角平分线.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/11/790a7b3b-5cf7-47c3-92da-4fe484be990d.png?resizew=101)
(1)若
,求
的长.(用a、b表示)
(2)过点D作
交
于点E,不添加任何辅助线,请直接写出图中所有等腰三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee54b9b398ce80cd054b56173fe810f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/11/790a7b3b-5cf7-47c3-92da-4fe484be990d.png?resizew=101)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d04cb107c01617e42ab8c8a53ce99d2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)过点D作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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适中
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【推荐1】如图,在
中,点D,E分别是
,
的中点,延长
至点
,使得
,连接
,
,
,
.
(1)求证:四边形
是平行四边形.
(2)若
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cca2d187a304eab931eedc2139c23ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/27/8cd5b2ec-b9d9-47fc-9571-a58ea532945d.png?resizew=202)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ebb33adb2310a6e03918761e68204a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
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【推荐1】如图,点P是正方形
边
上一点(不与点A,B重合),连接
并将线段
绕点P顺时针方向旋转
得到线段
,
交边
于点F,连接
.
;
(2)求
的度数;
(3)当点P是
的中点且
,则
的长为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f95fd176854673d22eb930f45103d76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb06af80fe292c2e2595ae23014761da.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d29e7c4d6216690152430b09f9cf0c2.png)
(3)当点P是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
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【推荐2】如图,点M,N分别在正方形
的边
上,且
.把
绕点A顺时针旋转
得到
,此时E,B,M共线.
(1)求证:
.
(2)若正方形
的边长为6,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8dbf16d3adcc74fbea454665bc66ca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4794cf7c57bdd4825d9e6615e2527a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eda61683bb1d4d62441f0625097b477.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/6/8b26fbcf-8e86-4117-b2aa-3c906113c449.png?resizew=123)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/362af923b80962478deb74abb55b3e78.png)
(2)若正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87b6497c7cada9c849f92d9ad00547ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
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