如图,在正方形
中,点
在对角线
上,连接
,
,延长
交
于点
,交
的延长线于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/efea8fe0-8a03-4968-85a2-e60cd6cb2454.jpg?resizew=174)
(1)求证:
.
(2)若
,且
,求
.
(3)若
,
,求正方形的边长.
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/efea8fe0-8a03-4968-85a2-e60cd6cb2454.jpg?resizew=174)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/984ea82358d83926755658d818326cda.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41fabe25aa3c56037fbcfa1f2d90fed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/793e03b60fc5ac445d6d44c508e7e73e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377b5f7197e5bd1afeea4d931307956a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4226621a9c781432634758de92e3c6a3.png)
更新时间:2023-12-13 15:39:36
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相似题推荐
解答题-证明题
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名校
【推荐1】如图,在四边形ABCD中,AD//BC,∠ABC=∠ADC=90°,对角线AC,BD交于点O,DE平分∠ADC交BC于点E,连接OE.
(1)求证:四边形ABCD是矩形;
(2)若∠BDE=15°;
①求证:△OEC是等腰三角形;
②求∠DOE的度数.
(1)求证:四边形ABCD是矩形;
(2)若∠BDE=15°;
①求证:△OEC是等腰三角形;
②求∠DOE的度数.
![](https://img.xkw.com/dksih/QBM/2021/7/23/2770471309172736/2781846932463616/STEM/085b88578d434cd2ac8eda18a607d691.png?resizew=153)
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【推荐2】如图
,在
中,
,
,
,如果点
由点
出发沿
方向向点A匀速运动,同时点
由点A出发沿
方向向点
匀速运动,它们的速度均为
连接
,设运动时间为
,解答下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/a33e6307-99a3-4acb-943a-c84b58bd4809.png?resizew=228)
(1)填空:用含
的代数式表示
______,
______;
(2)如图
,连接
,将
沿
翻折,得到四边形
,当四边形
为菱形时,求
的值;
(3)当
为何值时,
是等腰三角形?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c28be5dccf0a867ad905c3124d45277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28f9fc63aeaac7f7e359f1bcd734a90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05a81d63da32eb9501a0099ee7fd8df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c998028304b73e55bbac3f21ed0ceec2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ade192900d4d349f28364d84f37f28b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/a33e6307-99a3-4acb-943a-c84b58bd4809.png?resizew=228)
(1)填空:用含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebbc9c4e4db6374d5ba4c5dec8747442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/524f25e1eedbfe399f7f42db890ab89a.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b51ece6bb53c3f5bf2da7d9ee5960e44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/350e954f629c1901a5cec03558319e46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a2fa24cd847f1f9015ee9a0553f697a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a2fa24cd847f1f9015ee9a0553f697a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
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【推荐1】如图,
为
的对角线,
平分
为射线
上一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/877c5831-8b11-417c-a231-e638457f9201.png?resizew=475)
(1)如图1,
在
延长线上,连接
与
交于点
若
;
①当
为
中点时,求证:
;
②当
时,求
长度;
(2)如图2,
在线段
上,连接
与
交点于
,若
,试探究
三条线段之间的数量关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a1e9015beafa53441b0c43be88ebafd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d54abb88bbdc813994658fd8502ea4dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/877c5831-8b11-417c-a231-e638457f9201.png?resizew=475)
(1)如图1,
![](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/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27546408b3fc40aed7d7d66e35e5561.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0836c289f1c70d89f6d41b00635d952e.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d197ea8c1c8bbdf5edade431388eb713.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533963a9196536928d7e4d43caef51c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
(2)如图2,
![](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/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fedb443cdf265adb5edeb262da99cecc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27be70439eaf35026580cc2ad78d16a.png)
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【推荐2】在
中,
是
边上的高线
是
边上的中线,
于
,
.
(1)求证:
.
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/085cbdd37657b21dd1b686fc02d4f223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c8fb32ae05a9c1abd3374f5c5f7a999.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/401413ceec00db49eca223a72cd97a52.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71e6ea7333dbc78d0a7b9bc3892f940.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/2020/3/18/2422074019799040/2422194689507330/STEM/15455530a2ec4f6894d62d0b7f8e2acb.png?resizew=122)
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【推荐1】请阅读下列材料:
提出问题:现有2个边长是1的小正方形,请你把它们分割后,(图形不得重叠,不得遗漏),组成一个大的正方形,解决这个问题的方法不唯一,但有一个解题的思路是:设新正方形的边长为
.依题意,割补前后图形的面积相等,有
,解得
,由此可知新正方形的边长等于原来正方形的对角线的长.
![](https://img.xkw.com/dksih/QBM/2020/3/26/2427724446785536/2428475804196864/STEM/3915fcce78aa4366ae164e992b4cd9b1.png?resizew=198)
(1)解决问题:现有5个边长为1的正方形,排列形式如图3,请把它们分割后拼接成一个新的正方形,要求:画出分割线并在正方形网格图(图中每个小正方形的边长均为1)中用实线画出拼接成的新正方形.
小东同学的做法是:设新正方形的边长为
(
).依题意,割补前后图形的面积相等,有 ,解得
= .由此可知新正方形的边长等于两个正方形组成的矩形对角线的长.请你在图3中画出分割线,在图4中拼出新的正方形.
![](https://img.xkw.com/dksih/QBM/2020/3/26/2427724446785536/2428475804196864/STEM/951c25a36cf7437c9ab32f46a91f1b29.png?resizew=258)
(2)模仿演练:
现有10个边长为1的正方形,排列形式如图5,请把它们分割后拼接成一个新的正方形.要求:在图5中画出分割线,并在图6中的正方形网格图(图中每个小正方形的边长均为1)中用实线画出拼接成的新正方形.说明:直接画出图形,不要求写分析过程.
![](https://img.xkw.com/dksih/QBM/2020/3/26/2427724446785536/2428475804196864/STEM/f450dd2047c14b7da873848932396ca0.png?resizew=266)
(3)应用创新:
图7是一个大的矩形纸片剪去一个小矩形后的示意图,请你将它剪成三块后再拼成正方形(在图7中画出分割线,在图8中要求画出三块图形组装成大正方形的示意图).
提出问题:现有2个边长是1的小正方形,请你把它们分割后,(图形不得重叠,不得遗漏),组成一个大的正方形,解决这个问题的方法不唯一,但有一个解题的思路是:设新正方形的边长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac31b3e5f23bf70acbc02d7fe322f69e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdbf50b34d559607dc5a75c90a72e558.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d324b8cc99df14a6418e7d0f7b7d7436.png)
![](https://img.xkw.com/dksih/QBM/2020/3/26/2427724446785536/2428475804196864/STEM/3915fcce78aa4366ae164e992b4cd9b1.png?resizew=198)
(1)解决问题:现有5个边长为1的正方形,排列形式如图3,请把它们分割后拼接成一个新的正方形,要求:画出分割线并在正方形网格图(图中每个小正方形的边长均为1)中用实线画出拼接成的新正方形.
小东同学的做法是:设新正方形的边长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/2020/3/26/2427724446785536/2428475804196864/STEM/951c25a36cf7437c9ab32f46a91f1b29.png?resizew=258)
(2)模仿演练:
现有10个边长为1的正方形,排列形式如图5,请把它们分割后拼接成一个新的正方形.要求:在图5中画出分割线,并在图6中的正方形网格图(图中每个小正方形的边长均为1)中用实线画出拼接成的新正方形.说明:直接画出图形,不要求写分析过程.
![](https://img.xkw.com/dksih/QBM/2020/3/26/2427724446785536/2428475804196864/STEM/f450dd2047c14b7da873848932396ca0.png?resizew=266)
(3)应用创新:
图7是一个大的矩形纸片剪去一个小矩形后的示意图,请你将它剪成三块后再拼成正方形(在图7中画出分割线,在图8中要求画出三块图形组装成大正方形的示意图).
![](https://img.xkw.com/dksih/QBM/2020/3/26/2427724446785536/2428475804196864/STEM/49906a6e1fb14f8298e2b2fca9303185.png?resizew=266)
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【推荐2】图形变换是初中数学学习的重要内容,某兴趣学习小组的同学利用所学知识,进行了一系列的图形变换操作实践活动,让我们一起来体验他们的探究过程吧.
![](https://img.xkw.com/dksih/QBM/2022/11/10/3106400216727552/3112387132686336/STEM/a89bc642992a47e79411455881db9326.png?resizew=502)
(1)轴对称:将正方形纸片
折叠,使边
都落在对角线
上,展开得折痕
,连接
,如图1,求
的大小;
(2)旋转:将图1中的
绕点A旋转,使它的两边分别交边
于点H、G,连接
,如图2,则线段
之间存在的数量关系为________,并证明你的结论;
(3)计算:在图2中,连接正方形对角线
,若
的两边
分别交对角线
于点M、点N,如图3,若
,求正方形
的面积.
![](https://img.xkw.com/dksih/QBM/2022/11/10/3106400216727552/3112387132686336/STEM/a89bc642992a47e79411455881db9326.png?resizew=502)
(1)轴对称:将正方形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea77ba313fcc751481ac1ca214df3fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a26260c10afb34f543d86b67898134f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e31edc5b71c488ca9942d70d9298f01.png)
(2)旋转:将图1中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e31edc5b71c488ca9942d70d9298f01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/481e426224c3a3ce9bb5a731eed81c40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d451a45723af2b23c3bf36c147089d78.png)
(3)计算:在图2中,连接正方形对角线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/936af8bf3f3ed7a2d40e1211860fc347.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6a3e61be0e7275298a3677acd03a094.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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解答题-问答题
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较难
(0.4)
【推荐1】如图(1),已知△ABC和△ADE均为等腰直角三角形,点D、E分别在线段AB、AC上,∠C=∠AED=90°.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/a7e96e91-d083-4074-9b0c-f2fbd2c029b9.png?resizew=161)
(1)【观察猜想】
将△ADE绕点A逆时针旋转,连接BD、CE,如图(2),当BD的延长线恰好经过点E时:
的值为_____;∠BEC的度数为______度;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/fe62176b-3cf3-4105-9860-f5bd58f10bd3.png?resizew=167)
(2)【类比探究】
如图(3),继续旋转△ADE,连接BD,CE,设BD的延长线交CE于点F,请求出
的值以及∠BFC的度数;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/10b12070-bb67-49d5-a913-a0e0bb1f6b3a.png?resizew=178)
(3)【拓展延伸】
若
,
,当CE所在的直线垂直于AD时,请直接写出线段BD的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/a7e96e91-d083-4074-9b0c-f2fbd2c029b9.png?resizew=161)
(1)【观察猜想】
将△ADE绕点A逆时针旋转,连接BD、CE,如图(2),当BD的延长线恰好经过点E时:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9af91834644b94e1b023b33e15a0644.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/fe62176b-3cf3-4105-9860-f5bd58f10bd3.png?resizew=167)
(2)【类比探究】
如图(3),继续旋转△ADE,连接BD,CE,设BD的延长线交CE于点F,请求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9af91834644b94e1b023b33e15a0644.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/10b12070-bb67-49d5-a913-a0e0bb1f6b3a.png?resizew=178)
(3)【拓展延伸】
若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80e6292216592a5eba3293a85bbdb3e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/571508bc4c42f2a2b2b223f871a6b155.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如图,在矩形ABCD中,
,点P为对角线AC上的一个动点,连接PD,过点P作
,交直线AB于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/22/03e14574-4f09-4a2b-883e-d75c9b34f1b1.png?resizew=499)
(1)如图①,当点E在线段AB上时,
和
的数量关系为________,PE与DP的数量关系为_____.
(2)如图②,当点E在BA的延长线上时,连接DE若
,求DE的长;
(3)如图③,当点E在AB上时,过点P作
于点M,以线段PD,PE为邻边作矩形PEFD.设DM的长为x矩形PEFD的面积为y.请求出y与x之间的函数关系式及y的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/941057348460cb8677ca8569b3b08914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284b8decff9b3641c09a36e7654d9e92.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/22/03e14574-4f09-4a2b-883e-d75c9b34f1b1.png?resizew=499)
(1)如图①,当点E在线段AB上时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed8c43341c982e729dcd6c3b178865f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd82c51c8a9c1dd494cbb1d9c5411719.png)
(2)如图②,当点E在BA的延长线上时,连接DE若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de853a263e59781532f89fdab2a0acb7.png)
(3)如图③,当点E在AB上时,过点P作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a40b744f59a78172b82d3ea6a3216103.png)
您最近一年使用:0次