如图,矩形
中,
,将矩形
绕点C顺时针旋转得到矩形
.当点
恰好落在边
上时,旋转角为a,连接
,若
,求旋转角a的大小及
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48442db71d82561000891a81e74f0bf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655cc150ddc9deba2254780984d0024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68006b89c5f9b2cf1a980e5c69c0008c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2022/11/30/3120614906019840/3126558295949312/STEM/9bb39c65348245839d83f971854f0068.png?resizew=187)
更新时间:2022-12-08 18:22:02
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】已知直线
与
轴交于点
,与
轴交于点
.
(1)求
的度数;
(2)若直线
恰好平分
,且与
轴交于点
,求直线
的表达式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83837cefc88c90a2d7cb8873f642340c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2bc29145f6e7557711c34b443bd5e84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】如图,在
中,
,点D在
上,
,过A、D两点的圆的圆心O在
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/1b8b1d90-1233-458a-8833-4ccd56e23ab9.png?resizew=199)
(1)判断
所在直线与
的位置关系,并证明你的结论;
(2)若
,
,求图中阴影部分面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f76899b3a0bfbbdae7cb1148ad4bf018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/940699bc6596266f000d99efff2954d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/1b8b1d90-1233-458a-8833-4ccd56e23ab9.png?resizew=199)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f979d5406af7e951f386dbb55a9617eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
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解答题-作图题
|
适中
(0.65)
【推荐1】如图1,
中,
,
,
是以BC为斜边的等腰直角三角形.
![](https://img.xkw.com/dksih/QBM/2022/6/2/2992863912673280/2995564562792448/STEM/28a6c1c587cd448ea5a21f2a3cbaeb4c.png?resizew=245)
(1)求
的度数;
(2)将AB绕点A逆时针旋转90°得到AG,连接BG,GD,GC.
①若
,
,请在图2中补全图形,并求CD的长;
②过点C作
,垂足为F,请写出FD,FB,FC之间的数量关系,并证明你的结论.
![](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/dde157e7ed1fcf8c19b856ad3c5cffb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://img.xkw.com/dksih/QBM/2022/6/2/2992863912673280/2995564562792448/STEM/28a6c1c587cd448ea5a21f2a3cbaeb4c.png?resizew=245)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/868ff1350bd72625328c85c3097cd85e.png)
(2)将AB绕点A逆时针旋转90°得到AG,连接BG,GD,GC.
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fddf92bc87e5fd699ad43d5c54bf3ca.png)
②过点C作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65b0c9de008a0946fd775a8958ad1db1.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】综合与探究:
问题情境:数学课上,老师利用两块含
角的全等三角尺进行图形变换操作探究,其中
,
.
操作探究:
(1)将两个三角尺按如图1的方式在同一平面内放置,其中
与
重合,此时
,
,
三点共线,点
在点
异侧,求线段
的长;
操作探究2
(2)在图1的基础上进行了如下的操作:三角尺
保持不动,将三角尺
绕点
顺时针方向旋转角度
,射线
和
交于点
,如图2,认真分析旋转的过程中,解决下列问题:
①在旋转过程中,当
_________时,
;
②连接
,求证:
.
问题情境:数学课上,老师利用两块含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a2df0928a4c4337d9796a9aa67d8921.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/258706ef0e71b0e2899103b6ece6558a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/20/e176d0e0-283d-4502-b9bc-88b5ea6e841c.jpg?resizew=296)
操作探究:
(1)将两个三角尺按如图1的方式在同一平面内放置,其中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/b9521effc99744da7d1445af9681a3ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
操作探究2
(2)在图1的基础上进行了如下的操作:三角尺
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af6c9a36e2ef7189317ae652c56e49c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23b47f459bf46292108d7b5d257d6596.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c57b07f75e97d9f84718bd495ebcf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
①在旋转过程中,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9251dff989f7d60db751b73033dee269.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
②连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb9fa847f893bc238c97ee4e916e5368.png)
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解答题-问答题
|
适中
(0.65)
名校
【推荐1】如图,P为正方形ABCD内一点,若PA=a,PB=2a,PC=3a(a>0).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/23/3c874043-71cd-42e9-b6ec-a03904690dc4.png?resizew=150)
(1)求∠APB的度数;
(2)求正方形ABCD的面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/23/3c874043-71cd-42e9-b6ec-a03904690dc4.png?resizew=150)
(1)求∠APB的度数;
(2)求正方形ABCD的面积.
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,在
中,
,点
为
边上一点(不与点
重合),连接
,将
绕点
逆时针旋转得到
.
,写出旋转角及其度数;
(2)当
度数变化时,
与
之间存在某种不变的数量关系.请你写出结论并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf60168e3d44490108e11753d19cce5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb49df05f2e31d005735c3f14a21d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2334ac570fefa8bcb3f48ef6da9719e7.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57e7106619c08f2bcc1d21f846e8a0de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1384d0a02d097ac7aa8a19e8da6f9767.png)
您最近一年使用:0次