如图1,在
中,
,
.动点
从点
出发,以每秒1个单位的速度沿线段
向终点
运动,过点
作
交
于点
.以
为一边向右作正方形
.设点
的运动时间为
秒.正方形
与
重叠部分图形的面积为
.
时,
________;
(2)当点
落在
上时,
________;
(3)当
时,在图2中画出图形,并求出
的值;
(4)连接
,当
是等腰三角形时,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04fb30a9d07e410ac92c34b8ad0133db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b3f1c63921a86b0493c0c6ba5793a48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b3f1c63921a86b0493c0c6ba5793a48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3129ddd2ea97fd010b9e0b644225da8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447a9718a502491b47072ce013c26a2f.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209f628619c849207905b3d2bd3f07b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
(4)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
更新时间:2024-05-09 08:38:43
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】如图,在平行四边形ABCD中,AB=10,AD=16,∠A=60°,P是AD边上动点,PA=a,连结PB,将△APB沿PB折叠,得到△A′PB.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c80c579980e515925235b2c7aee86ec.png)
(1)当点A落BC边上时,求a的值;
(2)当a取何值时,PA′与四边形ABCD的边互相垂直.
![](https://img.xkw.com/dksih/QBM/2020/7/22/2511421739925504/2512547915907072/STEM/ddf9dc4fe37b493aa06334ab5e2b7529.png?resizew=119)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c80c579980e515925235b2c7aee86ec.png)
(1)当点A落BC边上时,求a的值;
(2)当a取何值时,PA′与四边形ABCD的边互相垂直.
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解答题-问答题
|
适中
(0.65)
【推荐2】图,
由
绕点C顺时针旋转得到,
三点在同一直线上,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/20/0089214a-a2f7-491b-9b12-b47e003095a2.png?resizew=220)
(1)求证:
是等腰三角形;
(2)连接
,若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f850c705372b8a85489505da53239fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32e4b3716628ee426bc145f59b8cedef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a428e02d1fa1937504356b929fc256d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/20/0089214a-a2f7-491b-9b12-b47e003095a2.png?resizew=220)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f850c705372b8a85489505da53239fd.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dd24906e2f368c2f182b5c9219f13bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e142544a6d4e6851096afbd3cbad2fe2.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐3】根据素材,探索完成任务.
如何裁剪出符合要求的长方形彩纸? | ||
素材1 | 图1是一张等腰直角三角形彩纸,![]() ![]() |
|
素材2 | 甲同学按图2的方式裁剪,想裁出两边长之比为![]() ![]() |
|
问题解决 | ||
任务1 | 请帮助甲同学计算此长方形面积. | |
任务2 | 请求出符合乙同学裁剪方案的长方形的长与宽. | |
任务3 | 请帮助丙同学在图4和图5中各画出一种裁剪方案,并通过计算说明哪种方案裁得的正方形面积最大.
|
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解答题-问答题
|
适中
(0.65)
【推荐1】如图,点
为平面直角坐标系的原点,点
在
轴上,
是边长为2的等边三角形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/30/2cc5fcfc-f389-4672-a358-f95443c56269.png?resizew=193)
(1)写出
各顶点的坐标;
(2)以点
为旋转中心,将
按顺时针方向旋转
,得到
,写出
,
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84ed6bee57f4526320197d6a7474386f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/30/2cc5fcfc-f389-4672-a358-f95443c56269.png?resizew=193)
(1)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84ed6bee57f4526320197d6a7474386f.png)
(2)以点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84ed6bee57f4526320197d6a7474386f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad1b0a76a887783392268ae203ad22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca89edd7efda291db17f84108a357f77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/778e18952da928a6a6e5bdf544ce2c58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4747ec744ffb25c74b664d5dfb48d45.png)
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解答题-计算题
|
适中
(0.65)
【推荐2】如图,在圆O中,过半径OD的中点C作
交圆O于A、B两点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/91f2cf7f-ec8c-4ead-b196-43b8b31c667f.png?resizew=159)
(1)求OD的长;
(2)计算阴影部分的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/603d9f88d32fafbe17fff2e18b96aa77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/91f2cf7f-ec8c-4ead-b196-43b8b31c667f.png?resizew=159)
(1)求OD的长;
(2)计算阴影部分的周长.
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
【推荐1】已知矩形
中,
是
边上的一个动点,点
、
、
分别是
、
、
的中点.
![](https://img.xkw.com/dksih/QBM/2020/5/8/2458322149564416/2458417691705344/STEM/52902dd0-95b7-4c0c-a50d-ddf23b332adb.png)
(1)求证:
.
(2)若
,当四边形
是正方形时,求矩形
的面积.
![](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/03902478df1a55bc99703210bccab910.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/2020/5/8/2458322149564416/2458417691705344/STEM/52902dd0-95b7-4c0c-a50d-ddf23b332adb.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2559a828988827dc80b0b9d34869e5e3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1522a9c3b2466395570c2689a4055584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】如图为
的方格(每个小正方形边长为1),按要求完成作图.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/6/86623402-3292-41da-b9ba-3bfb52621b86.png?resizew=510)
(1)在图1中作一个一边长为
的矩形(不是正方形);
(2)在图2中作一个面积为6的菱形;
(3)在图3中作一个面积最大的,但小于16的正方形;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fed892d056a84412355770243b5faf6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/6/86623402-3292-41da-b9ba-3bfb52621b86.png?resizew=510)
(1)在图1中作一个一边长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
(2)在图2中作一个面积为6的菱形;
(3)在图3中作一个面积最大的,但小于16的正方形;
您最近一年使用:0次