我们知道:在小学已经学过“正方形的四条边都相等,正方形的四个内角都是直角”.试利用上述知识,并结合已学过的知识解答下列问题:
如图,在正方形
中,点E是边
上的动点,将正方形沿着
折叠,点D落在点F处,连接
,交
于点Q,延长
交边
点G.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/29/bfd2de20-105c-4150-932e-289cdde647f2.png?resizew=151)
(1)求证:
;
(2)延长
交射线
于点H,若
,
,求
的长.
如图,在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/29/bfd2de20-105c-4150-932e-289cdde647f2.png?resizew=151)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c730490aa8e44ff2cf7474abd73502.png)
(2)延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0e849f9eee5ec8def4348a28399192.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8674aa2171819420b066645825034ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
更新时间:2022-04-07 07:16:39
|
相似题推荐
解答题-证明题
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【推荐1】如图,在
中,D是
边上的一点,连接
,E是
的中点,过A点作
的平行线交
的延长线于F,且
,连接
.
.
(2)如果
,试判断四边形
的形状,并证明你的结论.
![](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/03902478df1a55bc99703210bccab910.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/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd8e8b8dc232a88228f377b7782db172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532aece6cfd67e2a97977eed978dbf2b.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/778d541d9b66dde2f944dca7f93d6b67.png)
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【推荐2】如图,在菱形ABCD中,BE⊥CD于点E,DF⊥BC于点F.
(1)求证:BF=DE;
(2)分别延长BE和AD,交于点G,若∠A=45°,BE=4,求DG的值.
(1)求证:BF=DE;
(2)分别延长BE和AD,交于点G,若∠A=45°,BE=4,求DG的值.
![](https://img.xkw.com/dksih/QBM/2021/7/23/2770234855374848/2776325382635520/STEM/cadf8843cd844767bf3e1e5ebb8a6d27.png?resizew=260)
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【推荐1】如图1,在平面直角坐标系中,
的顶点
、
、点
,
交
于E点,交y轴正半轴于点D.
(1)求证:
;
(2)如图2,连接
,求
的度数;
(3)如图3,已知点
在y轴的正半轴上,若
,
,请直接写出点M的坐标(用含t的式子表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ad1f2017ff856c842da9e1f00ea621.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e605e2f3342a51de9b4110eef557419.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76338d35a153967d7a061b4cd9c85183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f913298f0fae9f55377a8deab9f099dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/6/d620a85c-5699-446a-a371-2b8d7ad629ab.png?resizew=426)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8386b38033fff5df7682a5a19c80fed1.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daebc8ac27b32eb46881840ea3da59f3.png)
(3)如图3,已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/551b3901b8d96e193947d239eb3b2e9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48322ed0f83c4d5cee1605ba927e361e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94e5adeb5a7e6eb0a34c13213fb9a133.png)
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【推荐2】若一个三角形存在两边的平方和等于第三边的平方,则这个三角形为直角三角形.现在,我们新定义一种三角形:若一个三角形中存在两边的平方差等于第三边上高的平方,则称这个三角形为勾股高三角形,两边交点为勾股顶点.例如图1,在
中,
,则
为勾股高三角形,其中C为勾股顶点,
是
边上的高.
(1)等腰直角三角形______勾股高三角形(请填写“是”或者“不是” );
深入探究
(2)如图2,已知
为勾股高三角形,其中C为勾股顶点且
,CD是AB边上的高.试探究线段AD与CB的数量关系,并给予证明.
(3)如图3,等腰
为勾股高三角形,其中
,
是
边上的高,过点D作
交
于点E. 若
,试求线段
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e099c3476db7c3df359c6fb80599a25e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(1)等腰直角三角形______勾股高三角形(请填写“是”或者“不是” );
深入探究
(2)如图2,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/594c9a8c6d789ada157beb3e6aeba799.png)
(3)如图3,等腰
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3582fb22962d70a3fa88e259e9736892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c0aa4c793921fdaa5d430cb90d78ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c6544495cdd913adfa727bda882a943.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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解答题-证明题
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【推荐1】如图,
是
上三点,且
,过点
作
于点
.
(1)求证:
.
(2)若
,求
的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97c6d27e5d4d8d0e7b7ad6d5341abd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c627c9216591f403b43b39a057bbb2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/18/93ddc66e-aded-40fa-8940-0487375c6029.png?resizew=140)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d03307f689eeb4ecb052c1f27bc9dc9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/141b82561b2595dd3746d01c3599b99b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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【推荐2】如图,在正方形
中,点
是
上一点,连接
,
的垂直平分线交
于点
,交
于点
,垂足为
,点
在
上,且
.
(1)求证:
;
(2)连接
,
,若
,
,求
的面积
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3407e83df0d037d628061f7a89b6b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3407e83df0d037d628061f7a89b6b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c197d8b99f2eb7477947e53461b5d548.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/8/6029a620-c689-4449-b462-7314b76988bc.png?resizew=131)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8218ef88271f1c927b65b6b408fb6df3.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a022d9ed35c8ce5ce01c2663a7115f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cafbe2751f4f4c5a8e676818195e9111.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ee826937d2add7a93aaa1422f8b736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cfeb35addf27f2379a8e5f87c9b952.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45f70d5826fdb875d73f6f62737beb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/416db26c64078ff8f6b576ab18964245.png)
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解答题-作图题
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【推荐3】已知,如图,O为坐标原点,四边形OABC为矩形,A(20,0),C(0,8),点D是OA的中点,动点P在线段BC上以每秒2个单位长的速度由点C向B 运动.设动点P的运动时间为t秒.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/13/1c5a5786-adcd-4cc3-b3f2-15582ab5d24a.png?resizew=480)
(1)当t为何值时,四边形PODB是平行四边形?
(2)在直线CB上是否存在一点Q,使得O、D、Q、P四点为顶点的四边形是菱形?若存在,求t的值,并求出Q点的坐标;若不存在,请说明理由.
(3)在线段PB上有一点M,且PM=10,当P运动 秒时,四边形OAMP的周长最小, 并在图②画出点M的位置.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/13/1c5a5786-adcd-4cc3-b3f2-15582ab5d24a.png?resizew=480)
(1)当t为何值时,四边形PODB是平行四边形?
(2)在直线CB上是否存在一点Q,使得O、D、Q、P四点为顶点的四边形是菱形?若存在,求t的值,并求出Q点的坐标;若不存在,请说明理由.
(3)在线段PB上有一点M,且PM=10,当P运动 秒时,四边形OAMP的周长最小, 并在图②画出点M的位置.
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【推荐1】如图,有一张边长为6的正方形纸片ABCD,P是AD边上一点(不与点A、D重合),将正方形纸片沿EF折叠,使点B落在点P处,点C落在点G处,PG交DC于H,连接BP.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/8/06a694e0-7bb6-4c28-9bad-17f0d7e5eade.png?resizew=148)
(1)求证:∠APB=∠BPH;
(2)若P为AD中点,求四边形EFGP的面积;
(3)当点P在边AD上移动时,△PDH的周长是否发生变化?写出你的结论并证明.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/8/06a694e0-7bb6-4c28-9bad-17f0d7e5eade.png?resizew=148)
(1)求证:∠APB=∠BPH;
(2)若P为AD中点,求四边形EFGP的面积;
(3)当点P在边AD上移动时,△PDH的周长是否发生变化?写出你的结论并证明.
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解题方法
【推荐2】如图,正方形
中 ,点
在边
上,且
.将
沿
翻折至
,延长
交边
于点
,连结
.
的度数;
(2)求证:
;
(3)若
,则
的面积等于 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](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/2e7920c260a4793cb02b78dabe2d817d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca2698f08d94afa1cd5b81444791f4c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/024ce4b66b4c942ad324a5c8bc18a47d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb04f507cc2eadbb5881f815d206d81e.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ba601e0853ef7ff5a2def1fd3ff87bc.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db6b87e8fbd45bdbfc480508057c0298.png)
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