如图,四边形
是正方形.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/9/1106efbd-6709-4bd8-bd28-17d0b98f07bb.png?resizew=386)
(1)问题解决:如图①,若
,
分别是
,
上的点,且
.求证:
;
(2)类比探究:如图②,若点
,
,
,
分别在
,
,
,
上,且
,求证:
F.
(3)迁移应用:如图③,在
中,
,
,点
是
的中点,点
是
上一点,且
,求
:
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/9/1106efbd-6709-4bd8-bd28-17d0b98f07bb.png?resizew=386)
(1)问题解决:如图①,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9576dc0787e3a65d7f8ea2a436617c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9327d1c2faee1d33db246ab52e43e4f9.png)
(2)类比探究:如图②,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f96461af9193d5d7867ddf8fcbefcaec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e336d8c1385e1a71ae67b7ee01db1d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23131e0a1dd1bf36c70eff2a54fe65e.png)
(3)迁移应用:如图③,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c7d01c3618d579121d95d41a63c565.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c029f2663b3fd557c9169e295c353e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96dae1059483b2532096123ee80ee50b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9171484a68c84cad91e4f2233392f600.png)
更新时间:2023-05-07 14:30:16
|
相似题推荐
解答题-作图题
|
适中
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名校
【推荐1】如图是由小正方形组成的
网格,每个小正方形的顶点叫做格点,
的三个顶点都是格点,仅用无刻度的直尺在给定网格中完成画图,画图过程用虚线表示.
;点D是边
与网格线的交点,过点D作直线平分四边形
的周长;
(2)在图2中,P是边
与网格线的交点,在
边上画点Q,使
;
(3)在图3中,P是边
与网格线的交点,在
边上画点Q,使
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b7bb621329c6e9fbe461f2e8ea8d1cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
(2)在图2中,P是边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2952c1bb3373bd9cb2b8c59c8ec55f4b.png)
(3)在图3中,P是边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2952c1bb3373bd9cb2b8c59c8ec55f4b.png)
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解答题-证明题
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【推荐2】如图,在四边形
中,
,
与
交于点E,点E是
的中点,延长
到点F,使
,连接
.
.
(2)若
,
,
,求四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7bd0846e377e291fc3483792e2d599a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f48d1cbd6610c5daa16ea33deab9406.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21fe7f306533f388843ff62fa2b5251a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99256fcfc0f71e0e8992c2cf40b93cee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61ba6f4177822927b5875b92cd5f2038.png)
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解答题-问答题
|
适中
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【推荐1】四边形ABCD中,DC∥AB,∠D=2∠B,CD=3,AD=2,求AB的长度.
![](https://img.xkw.com/dksih/QBM/2016/3/8/1573981795123200/1573981801684992/STEM/e25fdffc64734aef857ef2666efed6d6.png)
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解答题-作图题
|
适中
(0.65)
【推荐2】某同学用10×10的方形网格绘制了遵义市四所初级中学(黑色格点)的位置图.(平方单位)
(1)请在适当的位置建立平面直角坐标系,并根据该平面直角坐标系解答下列问题;
(2)分别写出四所中学所在位置的坐标:一中 ,二中 ,三中 ,四中 ;
(3)分别记一中A、二中B、四中C,移动“三中”的位置于点D(请自行在图中标记),连接A、B、C、D四点组成的四边形ABCD为平行四边形.
①移动后所得D点的坐标是 (写一个点);
②求所得平行四边形ABCD的面积.
(1)请在适当的位置建立平面直角坐标系,并根据该平面直角坐标系解答下列问题;
(2)分别写出四所中学所在位置的坐标:一中 ,二中 ,三中 ,四中 ;
(3)分别记一中A、二中B、四中C,移动“三中”的位置于点D(请自行在图中标记),连接A、B、C、D四点组成的四边形ABCD为平行四边形.
①移动后所得D点的坐标是 (写一个点);
②求所得平行四边形ABCD的面积.
![](https://img.xkw.com/dksih/QBM/2019/6/2/2217024733782016/2223519041429504/STEM/37dd35bd0f7b4d968bb41926be182d1c.png?resizew=134)
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解答题-证明题
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名校
【推荐1】在学习正方形的过程中,小明遇到了一个问题:在正方形
中,E是
边上的一点,过点D作
的垂线,分别交
,
于点G和点F.求证:
.他的思路是:首先利用正方形的性质得到正方形各边相等,再利用垂直,得到角相等,将其转化为证明三角形全等,使问题得到解决.请根据小明的思路完成下面的作图与填空:
证明:用尺规完成以下基本作图:过点D作
的垂线,分别与
、
交于点G、F;(不写作法和证明,保留作图痕迹)
是正方形,
∴
,
.
∵
,
∴
.
∵
,
∴
①
∴ ②
.
又∵
,
∴ ③
在
和
中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94d410e9542fe51c6498d086b285168b.png)
∴
.
∴
.
![](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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ff56ea00ca90825f3d95809de24f639.png)
证明:用尺规完成以下基本作图:过点D作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.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/405effb49ef901476701e72cc47918da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0d7095ddd69d6ceaf1065b1bc2c79d.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5bfca3269c2f36370cfa8841749cd32.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8689d619c2508c9000531fc1b8f1f21c.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad37b969c35d38dcdbf02e5d0f39afca.png)
∴ ②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4199edf380e38b9f31dd1bda2a1f443.png)
又∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5bfca3269c2f36370cfa8841749cd32.png)
∴ ③
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/592849d99e570c23906687097b1072ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94d410e9542fe51c6498d086b285168b.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec8e42b348aba65460d9bff2ba155a8b.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ff56ea00ca90825f3d95809de24f639.png)
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【推荐2】已知四边形ABCD是正方形,点P在直线BC上,点G在直线AD上(点P、点G不与正方形顶点重合,且在CD的同侧),PD=PG,DF⊥PG于点H,交直线AB于点F,将线段PG绕点P逆时针旋转90°得到线段PE,连接EF.
(1)如图1,当点P与点G分别在线段BC与线段AD上时,
①求证:DF=PG;
②请猜想四边形PEFD是怎样的特殊四边形,并证明你的猜想;
(2)如图2,当点P与点G分别在线段BC与线段AD的延长线上时,四边形PEFD的形状是否发生了变化?请写出你的结论.
(1)如图1,当点P与点G分别在线段BC与线段AD上时,
①求证:DF=PG;
②请猜想四边形PEFD是怎样的特殊四边形,并证明你的猜想;
(2)如图2,当点P与点G分别在线段BC与线段AD的延长线上时,四边形PEFD的形状是否发生了变化?请写出你的结论.
![](https://img.xkw.com/dksih/QBM/2022/1/9/2890544254689280/2890896011280384/STEM/5cd2c147-ea57-46d8-aba0-b3ad1cb2c896.png?resizew=373)
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解答题-问答题
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名校
【推荐1】在边长为10的菱形
中,对角线
相交于点O,过点O作直线
分别交
的延长线于点E、F,连接
.
(1)若
,判断四边形
的形状.并说明理由;
(2)若
于H,
,直接写出
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d578394cd8e4d7a705599269c512960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2897c5fcb535e6097a38820e8d0fd626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca7b50da9fef51f37b4813746d77a33a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/8/0c3be852-ec1e-44ac-aaa5-2923085ad53d.png?resizew=187)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6303f2da8eceff95a7d575881469da3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8bdae3d30abf70515bdbd45f9d0c380.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b6cc3789c0e9b7d1226aa0de3327599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfe1e55d6a08f57acb35836011f48da5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4cd68cc82e90a5e2049a7ea3171b84.png)
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解答题-应用题
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适中
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【推荐2】为弘扬民族传统体育文化,某校将传统游戏“滚铁环”列入了校运动会的比赛项目.滚铁环器材由铁环和推杆组成.小明对滚铁环的启动阶段进行了研究,如图,滚铁环时,铁环
与水平地面相切于点C,推杆
与铅垂线
的夹角为
,点O,A,B,C,D在同一平面内.当推杆
与铁环
相切于点B时,手上的力量通过切点B传递到铁环上,会有较好的启动效果.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/89062788-ee8d-405b-9811-0249b02f1e21.png?resizew=320)
(1)求证:
.
(2)实践中发现,切点B只有在铁环上一定区域内时,才能保证铁环平稳启动,图中点B是该区域内最低位置,此时点A距地面的距离
最小,测得
的长为50cm,铁环
的半径为25cm,推杆
的长为75cm,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/89062788-ee8d-405b-9811-0249b02f1e21.png?resizew=320)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b4c12c606f4cc0bfcb9ff07e7aaafde.png)
(2)实践中发现,切点B只有在铁环上一定区域内时,才能保证铁环平稳启动,图中点B是该区域内最低位置,此时点A距地面的距离
![](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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca4600275dda575e545cab0145d9480d.png)
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