如图1,若点M、N是某个正方形的两个对角顶点,则称M、N互为“正方形关联点”,这个正方形被称为M、N的“关联正方形”.
中,点P是原点O的“正方形关联点”.
①若
,则点O、P的“关联正方形”的周长为 ;
②若点P在直线
上,则点O、P的“关联正方形”面积的最小值为 ;
(2)如图2,已知点
,点B在直线l:上,正方形
是点A、B的“关联正方形”,顶点P、Q到直线l的距离分别为a、b,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70fa2c1e50403dd1cdd969d6308692eb.png)
②若点P在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39fbce43790a7dfbc35247843d60e231.png)
(2)如图2,已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed4ec13997c8c34ff2484491e4410dc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d4ab45e8e8f0084d8d90a4c1233d86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/152029d11db5c21e9c4badef3f011704.png)
更新时间:2024-04-27 05:44:31
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相似题推荐
解答题-问答题
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【推荐1】如图,在平面直角坐标系中,坐标原点记为
,直线
与
轴于点交
,与
轴交于点
,过点
的直线与
轴于点交
,
.
(1)求直线
的函数表达式;
(2)点
在直线
上,使得
是以
为腰的等腰三角形,求点
的坐标;
(3)坐标平面内一点
,连接
交
于点
,连接
,在坐标平面内是否存在点
,使得
,
?若存在,求出点
的坐标;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5293f31830b28b2f2e30f6b13bb79af.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0a98f4eef38bc232c90e766aeb55bc5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/7/6e006538-abd2-482f-816a-9259dd0741c1.png?resizew=455)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)坐标平面内一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8018f54c280f47bb507b02ec8972248a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be5fc6ead6416492c231c320a5486f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d99f8a3f5b41b808a1029784ae9a14b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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【推荐2】如图1,在平面直角坐标系中,直线
与x轴交于点A,与y轴交于点
,直线
与x轴交于点C,与直线
交于
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/16/b0a8483d-7257-4855-85f3-2e3a96131386.png?resizew=314)
(1)求直线
的解析式.
(2)点P是射线
上的动点,过点P作
且与
交于点Q,
轴垂足为点F,
轴垂足为点H,当四边形
为正方形时,求出正方形的边长.
(3)如图2,连接
,将
沿直线
翻折得到
.若点M为直线
上一动点,在平面内是否存在点N,使得以B、G、M、N为顶点的四边形为菱形,若存在,直接写出N的坐标,并把求其中一个点N的过程写出来,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2e103ac6f7cc2b225de408eb4f90e2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e20bed76b039276239f5139796baf8f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eea5c8fe935beac660eda538e59cd43f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd8f64ebec4a71a609204458cc54df82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa2ebcb409f987502fa539093e7f2edc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0c21c7d6d85bb96723e12fac3b1bd66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3722a16503ee447ab3a165bb44c83f9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/16/b0a8483d-7257-4855-85f3-2e3a96131386.png?resizew=314)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eea5c8fe935beac660eda538e59cd43f.png)
(2)点P是射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93c3f982d999937891eec4cb22d62e5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ff722e4809281f7d61d854c51ae1b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eea5c8fe935beac660eda538e59cd43f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/275b43064101fea2f1f964686e9fa661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071fa050290fc994d3a4573882118755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b59494bd873efe87ce8120b4055a4e6.png)
(3)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c042ff18466e8165fadf343d142a4b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbfae309c75ffadc3aaa47a5c348465b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02de39cb67b962d22e6a469cdc2ca5da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
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解题方法
【推荐3】如图,直线
分别与x轴,y轴相交于点A,点B,作矩形ABCD,其中点C,点D在第一象限,且满足AB∶BC=2∶1.连接BD.
(1)求点A,点B的坐标.
(2)若点E是线段AB(与端点A不重合)上的一个动点,过E作EF∥AD,交BD于点F,作直线AF.
①过点B作BG⊥AF,垂足为G,当BE=BG时,求线段AE的长度.
②若点P是线段AD上的一个动点,连结PF,将△DFP沿PF所在直线翻折,使得点D的对应点
落在线段BD或线段AB上.直接写出线段AE长的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06bb80c6d18691920bb7c174f04940f2.png)
(1)求点A,点B的坐标.
(2)若点E是线段AB(与端点A不重合)上的一个动点,过E作EF∥AD,交BD于点F,作直线AF.
①过点B作BG⊥AF,垂足为G,当BE=BG时,求线段AE的长度.
②若点P是线段AD上的一个动点,连结PF,将△DFP沿PF所在直线翻折,使得点D的对应点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/d934003d-ed65-4302-abf4-5d56e9a60fc0.png?resizew=368)
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【推荐1】如图1,点E为正方形ABCD内一点,∠AEB=90°,现将Rt△ABE绕点B按顺时针方向旋转90°,得到△CBF(点A的对应点为点C),延长AE交CF于点G.
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923527614390272/2923989896257536/STEM/24afb67f3c834212bd7c5825364a4b6a.png?resizew=462)
(1)求证:四边形BEGF是正方形;
(2)连接DE,①如图2,若AB=15,CG=3,试求BE的长;②如图3,若DA=DE,求证:CG=FG.
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923527614390272/2923989896257536/STEM/24afb67f3c834212bd7c5825364a4b6a.png?resizew=462)
(1)求证:四边形BEGF是正方形;
(2)连接DE,①如图2,若AB=15,CG=3,试求BE的长;②如图3,若DA=DE,求证:CG=FG.
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【推荐2】在
中,
,将
绕点
按逆时针方向旋转,得到
,旋转角为
,点
的对应点为点
,点
的对应点为点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/1/ec80a3c7-59ab-4991-9979-34a729ba450d.png?resizew=387)
(1)如图,设边
与
交于点
,边
分别交
于点
.
①求证:
;
②当
为等腰三角形时,请直接写出
的长;
(2)当
时,连接
,请直接写出
的面积;
(3)在旋转过程中,当
的面积的最大时,请直接写出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35ed37e2f1484ae6d7c413a0d0c69f32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05df5a26c2b978503e93efa040b99508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/1/ec80a3c7-59ab-4991-9979-34a729ba450d.png?resizew=387)
(1)如图,设边
![](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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa49835cb36d11ba406fa8cabbecd69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5501ff3d53f856b6627d99a5a8f68f2a.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2765917637583d22a579ff075f9baa3.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87b61c3a4b98899979151c7584147e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd657e48b15b9b54a55817e2c26b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40b3e9a99b5b8258baab51f66d1a48ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
(3)在旋转过程中,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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【推荐1】在
中,
点
为
边上任意一点,点
是线段
的中点.
(1)如图1,若
,求
的面积;
![](https://img.xkw.com/dksih/QBM/2020/4/11/2439432452022272/2439949259005952/STEM/8f66cb36a39d4662a8d567326082fc39.png?resizew=302)
(2)如图2,点
为
外一点,连接
若
且
求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8703029ff927514497a70f030203721.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/658dccee914e64f1bc7f1a0639ffdf81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://img.xkw.com/dksih/QBM/2020/4/11/2439432452022272/2439949259005952/STEM/6e641da86e0848658231756a43cc29d9.png?resizew=270)
![](https://img.xkw.com/dksih/QBM/2020/4/11/2439432452022272/2439949259005952/STEM/8f66cb36a39d4662a8d567326082fc39.png?resizew=302)
(2)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e03ce797b69c6041931e9f259ab185cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92ed5b4ee2304528ebf2645841caf6f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe5463749586dfe2c13b4efbc0e2fbe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed2f8386717da41b13292e9fa1b3773e.png)
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【推荐2】如图,在△ABC中,AB=2,BC=6,∠B=60°,点P从B点出发向C点运动,在运动过程中,设线段BP的长为x,设线段AP的长为y.
![](https://img.xkw.com/dksih/QBM/2022/1/25/2901942536314880/2936859901108224/STEM/cdf6ebb4-b44c-4dc8-950c-5468b2703a70.png?resizew=223)
(1)请填写下表;
(2)在如下平面直角坐标系中,利用表格中的数据画出y关于x的图像;(参考值:
,
,
)
![](https://img.xkw.com/dksih/QBM/2022/1/25/2901942536314880/2936859901108224/STEM/12227366-e478-493f-a37a-fd22c6cfc31d.png?resizew=261)
(3)当AP=2BP时,利用图像判断x的取值范围为( )
A.0<x<0.5 B.0.5<x<1 C.1<x<1.5 D.1.5<x<2
(4)当△ABP为钝角三角形时,请直接写出x的取值范围___________.
![](https://img.xkw.com/dksih/QBM/2022/1/25/2901942536314880/2936859901108224/STEM/cdf6ebb4-b44c-4dc8-950c-5468b2703a70.png?resizew=223)
(1)请填写下表;
x | 0 | 1 | 2 | 3 | 4 | 5 | 6 |
y | 2 | 2 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47bb3f35e3db7c1f3a3dd3eb20151b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923557f74987174405af890c9a772c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8e496bdb9e604468e21e449277f3fcb.png)
![](https://img.xkw.com/dksih/QBM/2022/1/25/2901942536314880/2936859901108224/STEM/12227366-e478-493f-a37a-fd22c6cfc31d.png?resizew=261)
(3)当AP=2BP时,利用图像判断x的取值范围为( )
A.0<x<0.5 B.0.5<x<1 C.1<x<1.5 D.1.5<x<2
(4)当△ABP为钝角三角形时,请直接写出x的取值范围___________.
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【推荐1】如图1,在平面直角坐标系中,直线
交两坐标轴于A、B两点(
),且
、
的长是一元二次方程
的两根.
(1)求直线
的解析式;
(2)以线段
为边作正方形
(如图2),对角线
交于点E,
的平分线
交
于F,求
的长;
(3)若M是y轴上任一点,点N是坐标平面内一点,若以A、B、M、N为顶点的四边形是菱形,请直接写出N点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6287ad228b738f86df209930b8a26728.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dac77366c746161a381e0589d63e451.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/12/bca047f8-7b6e-4964-92a8-7b1e8b0212ca.png?resizew=245)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)以线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d578394cd8e4d7a705599269c512960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76bc8e50eeccced1d7f3bc52e09a7d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
(3)若M是y轴上任一点,点N是坐标平面内一点,若以A、B、M、N为顶点的四边形是菱形,请直接写出N点的坐标.
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
中,
,
,
.平行四边形
顶点D在边
上,顶点E,F在边
上,顶点G在边
上
是矩形,设
,
,求y与x的关系式;
(2)如图(2),若四边形
是正方形,求
的长;
(3)小涵同学在图(3)中画菱形
,探索发现可作出的菱形的个数随着点D的位置变化而变化,请你继续探索,直接写出菱形的个数及对应的
的长的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec07464a1b5bc7a2cc338b1a13e0f4a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18536c3278726216ba83163f23a2203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5d70e5d13db498f1c8a2e017c56e58b.png)
(2)如图(2),若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(3)小涵同学在图(3)中画菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐3】【问题情境】数学课上,王老师出示了这样一个问题:如图1,在矩形
中,
,
是
延长线上一点,且
,连接
,交
于点
,以
为一边在
的左下方作正方形
,连接
.试判断线段
与
的位置关系.
(1)【探究展示】小明发现,
垂直平分
,并展示了如下的证明方法:
证明:∵
,
∴
.
∵
,
∴
.
∵四边形
是矩形,
∴
.
∴__________.(平行线分线段成比例)
∵
,
∴
.
∴
.
即
是
的
边上的中线,
又![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
∴__________.(等腰三角形的“三线合一”)
∴
垂直平分
.
请将上述证明过程补充完整;
(2)【反思交流】
小颖受到小明的启发,继续进行探究,如图2,连接
,以
为一边在
的左下方作正方表
,发现点
在线段
的垂直平份线上,请你给出证明;
(3)【拓展应用】
如图3,连接
,以
为一边在
的右上方作正方形
,分别以点
,
圆心,
为半径作弧,两弧交于点
,连接
.若
,请直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b929269c53a44907dba8ee298a0a522.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e92f48e9bfe12d145f7d2a2f0360d0.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/ac047e91852b91af639feec23a9598b2.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/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/22/f230059e-05bc-4b35-8c79-51bad923baf1.jpg?resizew=480)
(1)【探究展示】小明发现,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
证明:∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e92f48e9bfe12d145f7d2a2f0360d0.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/019a351c8982e78e7c69503880e2f7a2.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b929269c53a44907dba8ee298a0a522.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
∵四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
∴__________.(平行线分线段成比例)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e92f48e9bfe12d145f7d2a2f0360d0.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/479b9cd3d4a1c6707a7dc608734d4f44.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4796a77ffd026046b8eefd50938830a2.png)
即
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
又
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
∴__________.(等腰三角形的“三线合一”)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
请将上述证明过程补充完整;
(2)【反思交流】
小颖受到小明的启发,继续进行探究,如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1f13007c6d134c50004c62dc240707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(3)【拓展应用】
如图3,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.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/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c2e34bbbc4af1fe2a35009aae67e251.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次