已知:正方形
中,对角线
与
交于O点,点E为线段
上一点,连接
,将线段
绕点A逆时针旋转
得到线段
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/13/65969624-eb4f-46f7-9f2b-a801c6af7e56.png?resizew=132)
(1)求证:
;
(2)猜想
、
、
之间的数量关系,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/683c590673eece14fea3319c4fd5eb55.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/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/13/65969624-eb4f-46f7-9f2b-a801c6af7e56.png?resizew=132)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afedac49ce38f25e0a73e579133afe5a.png)
(2)猜想
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
更新时间:2024-03-14 06:53:27
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】在
中,
,
,
平分
交AC于点D,
于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/5ed00345-6f94-41fc-a4ab-cd7db8bf0d11.png?resizew=352)
(1)如图1,连接
,求证:
是等边三角形;
(2)如图2,若在线段
上取一点M(不与点C、D重合),在
的延长线上截取
,连接
、
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/5ed00345-6f94-41fc-a4ab-cd7db8bf0d11.png?resizew=352)
(1)如图1,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
(2)如图2,若在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84ab2f79f4bbe8f07abcde5acf071d86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e470b9b1ab6b8db7d19dc1e48ad6f09b.png)
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解答题-作图题
|
适中
(0.65)
【推荐2】图①、图②、图③均是
的正方形网格,每个小正方形的边长均为1,每个小正方形的顶点称为格点,
的顶点均在格点上,只用无刻度的直尺,在给定的网格中,分别按下列要求画图,保留作图痕迹.
(1)在图①中的
边上找到一点
,使
;
(2)在图②中找到一格点
,连接
,使
;
(3)在图③中找到一格点
,连接
,使
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd4be97adde17423d59d86d18318c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/8/e1a4b83e-4b1a-4508-9165-8345db22eedf.png?resizew=436)
(1)在图①中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57eb33b3f1cf4d775e4d75368d4e96b4.png)
(2)在图②中找到一格点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c8ba4da3a6b049f010c91ccb4f328ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e56c222c15e924079ccc0f4213ddb3f.png)
(3)在图③中找到一格点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb73ae3dc9f67bcf303e7c94a37080d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaa6f7a440e027b540e0edd8f02410e0.png)
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解答题-证明题
|
适中
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名校
【推荐1】我们知道,到线段两端距离相等的点在线段的垂直平分线上.由此,我们可以引入如下新定义:到三角形的两个顶点距离相等的点,叫做此三角形的准外心.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/205f20bb-aff1-41a5-ad81-05937aa61e17.png?resizew=276)
(1)如图1,点P在线段BC上,∠ABP=∠APD=∠PCD=90°,BP=CD.求证:点P是△APD的准外心;
(2)如图2,在Rt△ABC中,∠BAC=90°,BC=5,AB=3,△ABC的准外心P在△ABC的直角边上,试求AP的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/205f20bb-aff1-41a5-ad81-05937aa61e17.png?resizew=276)
(1)如图1,点P在线段BC上,∠ABP=∠APD=∠PCD=90°,BP=CD.求证:点P是△APD的准外心;
(2)如图2,在Rt△ABC中,∠BAC=90°,BC=5,AB=3,△ABC的准外心P在△ABC的直角边上,试求AP的长.
您最近一年使用:0次
解答题-证明题
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适中
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【推荐2】如图,已知
为
的直径,F为
上一点,
平分
且交
于点C,过点C作
交
的延长线于点D,延长
、
交于点E,连接
、
.
是
的切线;
(2)若
,求
的长;
(3)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac37366d2b54dc7d9a95ac6ddda5f3a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70c5fd65265f85df7d149d83d80d4e62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7098dc6b1097586ad6120e1b9c01bd75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/addd0acaf823bf6d7462d32c9681e6b8.png)
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解答题-证明题
|
适中
(0.65)
【推荐1】如图,已知四边形ABCD为正方形,点E在对角线AC上,连接DE,过点E作EF⊥DE,交BC于点F,以DE,EF为邻边作矩形DEFG,连接CG.
(1)求证:ED=EF;
(2)若四边形DECG的面积为9,求CE+CG的值.
(1)求证:ED=EF;
(2)若四边形DECG的面积为9,求CE+CG的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/3/62e9eacb-4378-4914-b5f0-c7a75988de07.png?resizew=198)
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解答题-证明题
|
适中
(0.65)
【推荐2】已知:在正方形
中,点
分别是
延长线上的点,且
,连接
交
于点
.
![](https://img.xkw.com/dksih/QBM/2022/12/17/3132888325873664/3133700847960064/STEM/65d0d42ffd9c49dc8456f4414a061e2f.png?resizew=322)
(1)如图1,当
在一直线上时,求证:点
为
中点;
(2)如图2,当
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50ccff1a13156ae92978f2deef2a0777.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92034dd2bb9480b18709d01153467f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99709bd8882599f2b3d9c398916084ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/2022/12/17/3132888325873664/3133700847960064/STEM/65d0d42ffd9c49dc8456f4414a061e2f.png?resizew=322)
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb346511e1e09a1ece167be60a1f8764.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aff4e79ec816c0dd2decaaac5fd47176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fc3b26fa429d1e30b1cea303b9341c8.png)
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解答题-问答题
|
适中
(0.65)
【推荐1】在平面直角坐标系中,已知O为坐标原点,点
,以点A为旋转中心,把
顺时针旋转,得
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/46023984-0438-434c-ba64-54d8cee8346f.png?resizew=354)
(1)如图①,当旋转后满足
轴时,求点
的坐标;
(2)如图②,当旋转后点C恰好落在
轴正半轴上时,求点
的坐标;
(3)在(2)的条件下,边
上的一点
旋转后的对应点为
,当
取得最小值时,求点
的坐标(直接写出结果即可).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ceb7de20011ac2cff1cc0aa770452cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/46023984-0438-434c-ba64-54d8cee8346f.png?resizew=354)
(1)如图①,当旋转后满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0122fba04c504636e801f962415f8a04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)如图②,当旋转后点C恰好落在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)在(2)的条件下,边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63ff0b454b9bb625ec9c03d60095e7b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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解答题-证明题
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【推荐2】综合与实践
问题情境:在综合实践课上,同学们探究“全等的等腰直角三角形图形变化问题”.
如图1,已知
,点
与点
重合,其中
,
.
和
按如图2所示方式摆放,点
落在
上,
所在直线交
所在直线于点
,连接
,求证;
.
(2)将图1中的
绕点
按逆时针方向旋转
(如图
),然后分别延长
,
,它们相交于点
,连接
.求证:
为等边三角形.
(3)将图1中的
绕点
按顺时针方向旋转
(如图
),线段
和
相交于点
,连接
,求线段
的长.
问题情境:在综合实践课上,同学们探究“全等的等腰直角三角形图形变化问题”.
如图1,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f03a43549ab71f0998fffbcb48397b00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59281d3136f2c67c078d98842171224d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae3bd3317114fbfc6e0252113e04abe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971b23e3ee827018557d6c88edd5369a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1165830b314a0dab65ea267e82bd3f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3d1d3c51f36c9913364a8fc8c643530.png)
(2)将图1中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c030b25575d683af91c06e6a3e4f463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.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/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
(3)将图1中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad1b0a76a887783392268ae203ad22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.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/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
您最近一年使用:0次