如图,在边长为
的正方形
各边上取点
,
,
,
(可与
,
,
,
重合),使得四边形
为正方形.设
为
,正方形
的面积为
.
(1)
关于
的函数表达式是________,自变量
的取值范围是________;
(2)在下面的平面直角坐标系
中,画出(1)中函数的图象;
(3)当
________
时,正方形
面积有最小值________
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/095ab4a92bf822e175d370e6d0c8a730.png)
![](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/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/5963abe8f421bd99a2aaa94831a951e9.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee3160fce05b551569b8c7b5de6dd8b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d740004cfdade4c185f722dadc27e15.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/1/65ce919d-8ed5-4359-862c-d6a1d05932f2.png?resizew=398)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)在下面的平面直角坐标系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ce13774b09ff2edddaf21a072cf60a.png)
更新时间:2024-02-01 14:46:15
|
相似题推荐
解答题-应用题
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适中
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【推荐1】随着劳动教育的开展, 某学校在校园开辟了一块劳动教育基地:一面利用学校的墙(墙的最大可用长度为28米),用长为40米的篱笆, 围成中间隔有一道篱笆的矩形菜地,在菜地的前端设计了两个宽 1米的小门,便于同学们进入.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/6a51d8ed-3763-4c0b-ab09-2c6bb2479968.png?resizew=220)
(1)若围成的菜地面积为120平方米,求此时边
的长;
(2)可以围成的菜地面积最大是多少?
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/6a51d8ed-3763-4c0b-ab09-2c6bb2479968.png?resizew=220)
(1)若围成的菜地面积为120平方米,求此时边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)可以围成的菜地面积最大是多少?
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【推荐2】如图,李师傅想用长为
米的栅栏,再借助教学楼的外墙围成-个矩形的活动区
.已知教学楼外墙长
米,设矩形
的边
米,面积为
平方米.
![](https://img.xkw.com/dksih/QBM/2021/2/3/2650177535598592/2677152529244160/STEM/e5bc4f31-a50f-4e73-8661-8255fae33ced.png)
(1)李师傅可否围出一个面积为
平方米的活动区域?如果可以,求出
的值;若不行,请说明理由;
(2)当
为多少米时,活动区的面积最大?最大面积是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f959e5f8d89390f0f136f6acc9f6fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e6f1af4b44b2e97e8f319bab4ae9010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c7a3d679b4dae63575903387a76ce45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://img.xkw.com/dksih/QBM/2021/2/3/2650177535598592/2677152529244160/STEM/e5bc4f31-a50f-4e73-8661-8255fae33ced.png)
(1)李师傅可否围出一个面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd3f655880d195d067a275e34a20a263.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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【推荐1】问题探究
(1)如图1所示,在
中,
,
是
的高.
求证:①
;②
.
迁移运用
(2)如图2所示,圆内接四边形
中,对角线
是直径,
,
,若
,
,求
.
(1)如图1所示,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eddf629bfb2d7b9daea6f2c1553360af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
求证:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46887681820d8e486bcb1a0d7c051bec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6dfd9d89d13e23dd59a4627bf9508d6.png)
迁移运用
(2)如图2所示,圆内接四边形
![](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/c4dd6e7c88601b4c50b06f1238fdd95d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d320f180419175d75eebc618cc458b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7cbfaec1d9dcaaf159b060163436113.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca7e1a727ba332984ad857b3d25344d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/3/a41ab30a-125a-459f-9339-c05fab261da8.png?resizew=296)
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【推荐2】如图,在四边形
中,
,
,
,
,点
从
开始沿
边向
以每秒
的速度移动,点
从
开始沿
边向
以每秒
的速度移动,如果点
、
分别从
、
同时出发,当其中一点到达终点时运动停止.设运动时间为
秒.
时,四边形
是平行四边形;
(2)
是否可能平分对角线
?若能,求出当
为何值时
平分
;若不能,请说明理由;
(3)若
是以
为腰的等腰三角形,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8ef58be8708144272538ee427fb92c.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b79850d6b00a67110e77a33d1c46b5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdebe7f5b900204915a325279a2ab706.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/976260cbf5e30856d4fd37a4b0a671a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/048b61a5fb5f420c6d7de88db5bc3aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209f628619c849207905b3d2bd3f07b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bddc68ed03fe7fd1fe30a5e626ba435.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/129f1d6567bef09b00b7f37894e6dba7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在矩形ABCD中,P是AD上一个动点,O为BD的中点,连接PO并延长交BC于点Q.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/11/e4487a24-7858-4066-9e25-f5de995f239b.png?resizew=143)
(1)求证:四边形PBQD是平行四边形;
(2)若AD=6cm,AB=4cm,点P从点A出发,以1cm/s的速度向点D运动(不与点D重合),设点P的运动时间为t秒,求当t为何值时,四边形PBQD是菱形
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/11/e4487a24-7858-4066-9e25-f5de995f239b.png?resizew=143)
(1)求证:四边形PBQD是平行四边形;
(2)若AD=6cm,AB=4cm,点P从点A出发,以1cm/s的速度向点D运动(不与点D重合),设点P的运动时间为t秒,求当t为何值时,四边形PBQD是菱形
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【推荐2】如图,圆柱形容器中,高为1.2m,底面周长为1m,在容器内壁离容器底部0.3m的点B处有一蚊子,此时一只壁虎正好在容器外壁,离容器上沿0.3m与蚊子相对的点A处,求壁虎捕捉蚊子的最短距离.(容器厚度忽略不计)
![](https://img.xkw.com/dksih/QBM/2020/5/31/2474350082383872/2475808422600704/STEM/c75d88f481fc462b89d66143fd36dd6f.png?resizew=89)
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1】如图,在正方形
中,
,E为对角线
上一动点,连接
,过点E作
,交
于点F.以
,
为邻边作矩形
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/6/2/488bacd5-f7e0-4b0f-bc14-51732a21e24d.png?resizew=137)
(1)求证:矩形
是正方形;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cedd51383f8f047f565191b128cec637.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f1282650d8829c072f846d338f0687d.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/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdff15fafea9a3b60d69a1789ef0220a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb11667abcb2759f301391b9850352be.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/6/2/488bacd5-f7e0-4b0f-bc14-51732a21e24d.png?resizew=137)
(1)求证:矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdff15fafea9a3b60d69a1789ef0220a.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09c718aee0d27045dea7face6ee5890.png)
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解答题-问答题
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适中
(0.65)
【推荐2】如图,已知正方形
的边长为
,
,将正方形边
沿
折叠到
,延长
交
于点
,则
的周长是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da45c443af7994a26ffa9d8894e7262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/104cacf19f1897c6c86d24c5fe8cb991.png)
![](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/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20227c155003de7163d407daf0a5e74.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/2/cc8aa85f-b286-4eac-9a9c-e77589cf404c.png?resizew=136)
您最近一年使用:0次