实践与探究
操作一:如图①,将矩形纸片
对折并展开,折痕
与对角线
交于点
,连接
,则
与
的数量关系为______.
操作二:如图②,摆放矩形纸片
与矩形纸片
,使
、
、
三点在一条直线上,
在边
上,连接
,
为
的中点,连接
、
.求证:
.
拓展延伸:如图③,摆放正方形纸片
与正方形纸片
,使点
在边
上,连接
,
为
的中点,连接
、
、
.已知正方形纸片
的边长为5,正方形纸片
的边长为
,求
的面积.
操作一:如图①,将矩形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
操作二:如图②,摆放矩形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a8586ae37f043ee8d5162dec22126b.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90fab40f323d2963eb0c4cdf39018fef.png)
拓展延伸:如图③,摆放正方形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a8586ae37f043ee8d5162dec22126b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a8586ae37f043ee8d5162dec22126b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9825e881728e22d0b8d4dab50854c433.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/14/5fa623b6-00f8-4955-ad03-22b863675f25.png?resizew=510)
2023·山东菏泽·一模 查看更多[6]
2023年山东省菏泽市郓城县九年级下学期第一次模拟数学考试 2023年山东省菏泽市郓城县中考一模数学试题(已下线)专题16 几何综合压轴-学易金卷:2023年中考数学一模试题分项汇编(山东专用)(已下线)第5章 特殊平行四边形 章末重难点检测卷-【帮课堂】2022-2023学年八年级数学下册同步精品讲义(浙教版)(已下线)2023年广东省佛山市中考一模数学试卷变式题21-23题江苏省淮安市淮安区2022-2023学年八年级下学期期末调研测试数学试题
更新时间:2023-04-26 19:54:31
|
相似题推荐
解答题-证明题
|
较难
(0.4)
解题方法
【推荐1】如图,过边长为4的等边△ABC的顶点A作直线l∥BC,点D在直线l上(不与点A重合),作射线BD,将射线BD绕点B顺时针旋转60°后交直线AC于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/29/01a3c36a-4a3a-414f-bfe1-a8a88c7ffe24.png?resizew=436)
(1)如图1,点D在点A的左侧,点E在边AC上,请直接写出AB,AD,AE间的关系
(2)如图2,点D在点A的右侧,点E在边AC的延长线上,那么(1)中的结论还成立吗?若成立,请证明;若不成立,写出你的结论,再证明.
(3)如图3,点E在边AC的反向延长线上,若∠ABE=15°,请直接写出线段AD的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/29/01a3c36a-4a3a-414f-bfe1-a8a88c7ffe24.png?resizew=436)
(1)如图1,点D在点A的左侧,点E在边AC上,请直接写出AB,AD,AE间的关系
(2)如图2,点D在点A的右侧,点E在边AC的延长线上,那么(1)中的结论还成立吗?若成立,请证明;若不成立,写出你的结论,再证明.
(3)如图3,点E在边AC的反向延长线上,若∠ABE=15°,请直接写出线段AD的长.
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
解题方法
【推荐2】如图
,矩形
与矩形
全等,点
,
,
和点
,
,
分别在同一直线上,且
,
,连接
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/d99eb55a-2a27-44b4-8912-84ea939fdb60.png?resizew=470)
(1)在图
中,连接
,则
______;
(2)如图
,将图
中的矩形
绕点
逆时针旋转,当
平分
时,求点
到
的距离;
(3)如图
,将图
中的矩形
绕点
顺时针方向旋转,连接
,
,两线相交于点
,求证:点
是
的中点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1f13007c6d134c50004c62dc240707.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d62d95da5235c7fe783203d8f7c81b64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da4b475436f58b129e0197c00b84c8d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/d99eb55a-2a27-44b4-8912-84ea939fdb60.png?resizew=470)
(1)在图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e5f441402ee632377b6bedeb060f3d9.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1f13007c6d134c50004c62dc240707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/752fa646a2d9cfca34001748445301c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1f13007c6d134c50004c62dc240707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】如图,在
中,
为边
的中点,点
分别在线段
上,
平分
,垂足为点
,交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/14/24c2b3cf-1eb6-4184-8ee8-e6520488f4e1.png?resizew=229)
(1)求证:
;
(2)若
(m为常数),求证:
;
(3)在(2)的条件下,若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2043ff1b8a975a71f72b93a499a4e0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e17966797ec9e37f56c1193af65ebf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/751bc49b260fb0f71b8d7064b4089db5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f49b00c0d18698700facccf243ba4bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/14/24c2b3cf-1eb6-4184-8ee8-e6520488f4e1.png?resizew=229)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/991631cee7adaa9a4b9488be7f183e2f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/503e9813d8c4b890ecb1d4a20fe7032e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59c147067786c2ad6fedfaf9682735e8.png)
(3)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19b85e635c029ca53025e9dba2094429.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3258d6203680dbd7949beebce44453b.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】如图,在直角
中,
,
,
,D是
边上的一个动点(不与A、C点重合),过点D作
边的垂线,交线段
于点E,点F是线段
的中点,作
,交射线
于点H,交射线
于点G.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/26/d54918f7-4fab-4fcc-ae4d-48e055630877.png?resizew=215)
(1)求证:
;
(2)设
,
,求y关于x的函数解析式,并写出它的定义域;
(3)当
时,求
的长.
![](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/68e744f480e11f588570c5d6738799f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e75248cdf0260725c2f8c7f85dc92f80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/26/d54918f7-4fab-4fcc-ae4d-48e055630877.png?resizew=215)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf58bdff361210c2165866e2c17f238.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2633a6f46b0847158eebb05c743561aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a975c10a6a41d7c22ac17acb0ccc4593.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83995492b4771467d58108e8f99e1b95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】如图,矩形
中,
是边
上一点,将
沿直线
对折,得到
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/24de6bce-7aa2-482b-983f-8ca046836421.png?resizew=278)
(1)当
平分
时,求
的长;
(2)连接
,当
时,求
的面积:
(3)当射线
交线段
于点
时,则
的最大值为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bc41b24d63058f76a63758eb7cc24ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f9fba8a4098c1a0515286eb8d616dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246b32e19ae21b0cd1f826c47f517ca0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/24de6bce-7aa2-482b-983f-8ca046836421.png?resizew=278)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df92344b00e2aa8e7f0d1fa997b9dd04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e46902c589b964c055aee819dc3e4ad0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f7ad41b36674fd6e90176ee24cdefbb.png)
(3)当射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】如图,在矩形
中,
,
,点E在直线
上,将
沿
折叠,点B落在点F处,连接
.
(1)如图1,当点F落在矩形
的对角线
上时,
①求
的长;
②求
的长.
(2)如图2,连接
,将
沿
折叠,点E落在点G处,连接
,得到四边形
,求证:四边形
是菱形.
(3)在(2)的条件下,当菱形
的一条对角线与矩形
的一条对角线在同一条直线上时,请直接写出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/8/7bc1d2f0-82ed-4b9a-967d-4475144c4fd3.png?resizew=297)
(1)如图1,当点F落在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/302e0089c8c4c7861d93979ebb8538ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc7ee0ef8945ba1b90e59aed7cab889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc7ee0ef8945ba1b90e59aed7cab889.png)
(3)在(2)的条件下,当菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc7ee0ef8945ba1b90e59aed7cab889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】小明准备给长16米,宽12米的长方形空地栽种花卉和草坪,图中I、II、III三个区域分别栽种甲、乙、丙三种花卉,其余区域栽种草坪.四边形
和
均为正方形,且各有两边与长方形边重合,矩形
(区域II)是这两个正方形的重叠部分,如图所示.
(2)若矩形
满
.
①求
,
的长;
②若甲、乙、丙三种花卉单价分别为150元/米2,80元/米2,150元/米2,且边
的长不小于边
长的
倍,求图中I、II、II三个区域栽种花卉总价W元的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefbab97316fc0d53d2b70ee83dee41c.png)
(2)若矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefbab97316fc0d53d2b70ee83dee41c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c93beb5ca16c3af4f7635f31f3578144.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1460aa3d83df61f6c411b34412135451.png)
②若甲、乙、丙三种花卉单价分别为150元/米2,80元/米2,150元/米2,且边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d59ab85c075a09d55d69e159e4abb268.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】我们定义:当m,n是正实数 ,且满足
时,就称P
为“完美点”.
(1)m=3时,则
,P点的坐标为 .
(2)已知点A(0,5)与点B都在直线y=-x+b上,且B是“完美点”,若C也是“完美点”且BC=
,求点C的坐标.
(3)正方形A1B1C1D1一边在y轴上,其他三边都在y轴的右侧,且点E(1,t)是此正方形对角线的交点,若正方形A1B1C1D1边上存在“完美点”,求t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/709e02714575bdb91da0632071ef41dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6b9b5cec6e4fe01d92ba8159d35bc6b.png)
(1)m=3时,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
(2)已知点A(0,5)与点B都在直线y=-x+b上,且B是“完美点”,若C也是“完美点”且BC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
(3)正方形A1B1C1D1一边在y轴上,其他三边都在y轴的右侧,且点E(1,t)是此正方形对角线的交点,若正方形A1B1C1D1边上存在“完美点”,求t的取值范围.
您最近一年使用:0次