如图,正方形ABCD和正方形CEFG(其中BD>2CE),直线BG与DE交于点H.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/13/9365291f-1896-4eda-8c90-06856f7405e9.png?resizew=158)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/13/89b33df1-6ef8-471d-98f9-aa94eeb8f478.png?resizew=159)
(1)如图1,当点G在CD上时,请直接写出线段BG与DE的数量关系和位置关系;
(2)将正方形CEFG绕点C旋转一周.
①如图2,当点E在直线CD右侧时,求证:
;
②当∠DEC=45°时,若AB=3,CE=1,请直接写出线段DH的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/13/9365291f-1896-4eda-8c90-06856f7405e9.png?resizew=158)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/13/89b33df1-6ef8-471d-98f9-aa94eeb8f478.png?resizew=159)
(1)如图1,当点G在CD上时,请直接写出线段BG与DE的数量关系和位置关系;
(2)将正方形CEFG绕点C旋转一周.
①如图2,当点E在直线CD右侧时,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9312bbab2e10c4be8d53d75b7a48c977.png)
②当∠DEC=45°时,若AB=3,CE=1,请直接写出线段DH的长.
2022·辽宁辽阳·一模 查看更多[2]
更新时间:2022-06-15 16:21:38
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相似题推荐
解答题-证明题
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【推荐1】如图1,在等腰Rt△ABC中,∠ABC=90°,AB=BC=6,过点B作BD⊥AC交AC于点D,点E、F分别是线段AB、BC上两点,且BE=BF,连接AF交BD于点Q,过点E作EH⊥AF交AF于点P,交AC于点H.
![](https://img.xkw.com/dksih/QBM/2022/2/12/2914700620333056/2924232159289344/STEM/0b5e556bc3a24e61ab586f746da54291.png?resizew=344)
(1)若BF=4,求△ADQ的面积;
(2)求证:CH=2BQ;
(3)如图2,BE=3,连接EF,将△EBF绕点B在平面内任意旋转,取EF的中点M,连接AM,CM,将线段AM绕点A逆时针旋转90°得线段AN,连接MN、CN,过点N作NR⊥AC交AC于点R,当线段NR的长最小时,直接写出△CMN的周长.
![](https://img.xkw.com/dksih/QBM/2022/2/12/2914700620333056/2924232159289344/STEM/0b5e556bc3a24e61ab586f746da54291.png?resizew=344)
(1)若BF=4,求△ADQ的面积;
(2)求证:CH=2BQ;
(3)如图2,BE=3,连接EF,将△EBF绕点B在平面内任意旋转,取EF的中点M,连接AM,CM,将线段AM绕点A逆时针旋转90°得线段AN,连接MN、CN,过点N作NR⊥AC交AC于点R,当线段NR的长最小时,直接写出△CMN的周长.
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【推荐2】如图1,在平面直角坐标系中,O为坐标原点,抛物线
与x轴负半轴交于点B,与x轴正半轴于点
,交y轴于点C,连接
,
.
(2)如图2,点P为第三象限抛物线上一点,连接
,
,若设
的面积为S,点P的横坐标为t,求S与t的函数关系式(不要求写出自变量t的取值范围);
(3)在(2)的条件下,如图3,过点P作
轴于点E,点K为抛物线的顶点,连接
交
于点F,点D为
上一点,
,连接
,若
,求点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f2b1f4120365cb6ee4925fe417563f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/882a826e79a9dc1ae2b67e3b87e2ac66.png)
(2)如图2,点P为第三象限抛物线上一点,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5dd6306e00de2ae82d6605308792db.png)
(3)在(2)的条件下,如图3,过点P作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae95e96ce568efee50145f8d017353df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48ad8115387158c8dda205d26968ba11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e4c6b0869d7248b6c2f964718a67702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3fb862991129d803d9b0e079deb9526.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84934cf8bfec08ff9271a16efd84847a.png)
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【推荐1】在等腰直角
中,
,
,D是线段
上一点,E是线段
延长线上一点,连接
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/9f01fb02-3d93-4e13-8df5-e7f499e1ba45.png?resizew=417)
(1)如图1,若
,
,
,求
的长度;
(2)如图2,过点E作
于点F,交
于点G,取
中点为M,过点A作
交
延长线于N,若
平分
,证明:
;
(3)如图3,将点C绕点B逆时针旋转
度
得点P,连接
、
,当
取最小值时,直线
与
交于点Q,将点Q绕点D顺时针旋转
度
得点
,连接
、
.若D是
中点,
,
,直接写出
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854f480c60b88b546cb15d3b5622e212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/9f01fb02-3d93-4e13-8df5-e7f499e1ba45.png?resizew=417)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffa5f75c22c4cc1ab39cf9c9962d40d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a36b550ecb5353bfecd88a64715070d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50f218914337edd06e59e75d90b777e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)如图2,过点E作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/082292e52d5b734762cf9c139ee550bf.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/2099666bc1f575f9d1b1476867bcaa52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57e7106619c08f2bcc1d21f846e8a0de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fc7f59a3796946e4179681ed1a3f602.png)
(3)如图3,将点C绕点B逆时针旋转
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d14ca0bddaf5ae1734338902b3c8add.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e23e9cb541907a9773700ac0c1f0c3a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/378e55e64a82bdf3033ec9451ca54349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a42da28be159399514cc6179a96e34b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bd7592d13706f179027fa911b5d75c3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b000d7a394a90a28353a5de378ba1234.png)
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【推荐2】如图,在
中,
,
,
,点P从点A出发,沿线段
以每秒3个单位的速度向终点B运动.当点P不与点A、B重合时,过点P作
交折线
于点Q.过点P、Q分别平行于
的直线相交于点R.设点P的运动时间为t秒,
与
重叠部分图形的面积为S.
(1)直接写出线段
的长(用含t的代数式表示).
(2)当点R落在边
上时,求t的值.
(3)当
与
重叠部分的图形为轴对称图形时,求t的值.
(4)直接写出
或
平分
面积时t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d84733f9dc908ceb11459cc2aed580ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a52ef2a5f53a6d6aed3617b64b3d58b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1225975b2f6869ca97903e7865b8aa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c28abb154f41e1ca9816c9c9c2433ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/16/a2b74a28-068d-4a60-8eb3-efda03b6dc35.jpg?resizew=107)
(1)直接写出线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
(2)当点R落在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c28abb154f41e1ca9816c9c9c2433ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(4)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c28abb154f41e1ca9816c9c9c2433ca.png)
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解题方法
【推荐1】已知:如图,在正方形
中,
是边
上一个动点(点E不与点B,点C重合),连接
,过点B作
,垂足为点G,交
于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/2f4f359f-cfe5-44f6-b5d2-d835d3c13c6b.png?resizew=173)
(1)求证:
.
(2)过点E作
交
的角平分线于点H,连接
,判断四边形
的形状,并说明理由.
(3)在(2)的条件下,
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cc06fde3e988d838a2482fc9c617938.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/fb91cb9a5a14169845d700fbd95890ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/2f4f359f-cfe5-44f6-b5d2-d835d3c13c6b.png?resizew=173)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04f8eebda19eded2b059774a8c2666c3.png)
(2)过点E作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b73c1b6e4570d5edd9ef4cf31f55c91e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e7eefad280b3c7c7db88ac005c7e583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73f4f9af249030cb2f61ef938fa767df.png)
(3)在(2)的条件下,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fed8c2497002af02ee1290a2031e704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
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【推荐2】旋转与等腰直角三角形相结合,会产生很多美妙的数学结论,是训练几何探究思维很好的方式,麒麟中学八年级某数学兴趣小组做了以下操作探究,把共顶点的两个等腰直角三角形中的一个绕一点旋转一定角度
,探究旋转过程中相关图形的几何特性:已知等腰直角三角形
和等腰直角三角形
有一个公共的顶点
,且
.
与
的数量关系为_____,位置关系为______;
(2)将
绕着点
顺时针旋转
角(
).
①如图2,第(1)问的结论是否仍然成立?请说明理由.
②若
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f48208a3f67fd590d973badcc742d4b1.png)
,当
绕着点
顺时针旋转过程中,当点
、
、
三点共线时,连接
,则
的长度为_______;
③如图3,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f976007b8d754ac3bf5793ed2fce37.png)
,
绕着点
顺时针旋转,当点
在落在
上时,有
,延长
交
的延长线于点
,做点
关于
的对称点
,连接
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ac5e13622afab5e9f8603afe42356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93f76b6ac1b8875af7156f3239dae6f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/210472c5944b197d5434b88d6e747dfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bb511e0a5d9918d382a1b811e290930.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd7e590c7c653e2e6c2f17b2473299fb.png)
①如图2,第(1)问的结论是否仍然成立?请说明理由.
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d527d4795ece4a5756d1cf8dba31e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f48208a3f67fd590d973badcc742d4b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bb511e0a5d9918d382a1b811e290930.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
③如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f976007b8d754ac3bf5793ed2fce37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bb511e0a5d9918d382a1b811e290930.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b50ca709db09ba0c1f0122d7327ac9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971b23e3ee827018557d6c88edd5369a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af83aa2410d6ab5d74a984b8fd745cbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af83aa2410d6ab5d74a984b8fd745cbc.png)
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解答题-问答题
|
困难
(0.15)
名校
【推荐1】在
ABC中,AB=7,∠A=45°,sinB=
,P为线段AB上一动点,设AP=x,过P作AB垂线交射线AC于点Q,将
APQ绕PQ中点旋转180°得到
DQP.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/9/9b9f08cf-3498-4ea6-8981-356637fd50cc.png?resizew=186)
(1)点C到AB的距离为 ;
(2)求出点D在
ABC内部时x的取值范围.
(3)当D点在
ABC外部时,边PD与边BC交点为E,当图形中存在全等三角形时(除
APQ与
DQP全等外),求BE的长.
(4)点F为BC中点,作点B关于PD的对称点
,连结
,当
与
ABC的边平行时,直接写出x值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/9/9b9f08cf-3498-4ea6-8981-356637fd50cc.png?resizew=186)
(1)点C到AB的距离为 ;
(2)求出点D在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
(3)当D点在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
(4)点F为BC中点,作点B关于PD的对称点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c5d54dfb9237412a7c1c00658830de6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e6fb1802b376e44a9ff8482f5a650c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e6fb1802b376e44a9ff8482f5a650c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
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解答题-问答题
|
困难
(0.15)
【推荐2】【操作发现】如图1,在边长为1个单位长度的小正方形组成的网格中,
的三个顶点均在格点上.
①请按要求画图:将
绕点A顺时针方向旋转
,点B的对应点为点
,点C的对应点为点
,连接
;
②在①中所画图形中,
______
.
【问题解决】如图2,在
中,
,延长
到D,使
,将斜边
绕点A顺时针旋转
到
,连接
,求
的度数.
【拓展延伸】如图3,在四边形
中,
,垂足为E,
,
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/2/369103fa-e58d-4e3d-8e4c-34aa0d51e4ce.png?resizew=600)
①请按要求画图:将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655cc150ddc9deba2254780984d0024.png)
②在①中所画图形中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16cdfe1a3136d80b16a24d745dc72990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
【问题解决】如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d95e6f0f076e72a9a85913110238c6da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037b342a682cbd4241855a243da3c016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dc2d2dd56fcc67698c45a6e0e48f80.png)
【拓展延伸】如图3,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e3f5dc11efe60b4fd9a13b1d6b83842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daab9a141223622f04b48993d7b32168.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9e24db47e37d968219b62b6a69712a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24a968c73e960698a572ab01e3698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b929269c53a44907dba8ee298a0a522.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
您最近一年使用:0次