如图1 ,等腰直角三角形 ABC 中,∠ACB=90°,CB=CA,直线 DE 经过点 C,过 A 作 AD⊥DE 于点 D,过 B 作 BE⊥DE 于点 E,则△BEC≌△CDA,我们称这种全等模型为 “K 型全等”.(不需要证明)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/15/9feb705f-57ab-4085-ac8c-f557ffc61afb.png?resizew=154)
【模型应用】若一次函数 y=kx+4(k≠0)的图像与 x 轴、y 轴分别交于 A、B 两点.
(1)如图 2,当 k=-1 时,若点 B 到经过原点的直线 l 的距离 BE 的长为 3,求点 A 到直线 l 的距离 AD 的长;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/15/63058c54-23b4-4e61-aa22-f0a69b8bd545.png?resizew=160)
(2)如图 3,当 k=-
时,点 M 在第一象限内,若△ABM 是等腰直角三角形,求点
M 的坐标;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/15/f7093d5c-791b-4299-a6fe-41e43a199145.png?resizew=145)
(3)当 k 的取值变化时,点 A 随之在 x 轴上运动,将线段 BA 绕点 B 逆时针旋转 90° 得到 BQ,连接 OQ,求 OQ 长的最小值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/15/9feb705f-57ab-4085-ac8c-f557ffc61afb.png?resizew=154)
【模型应用】若一次函数 y=kx+4(k≠0)的图像与 x 轴、y 轴分别交于 A、B 两点.
(1)如图 2,当 k=-1 时,若点 B 到经过原点的直线 l 的距离 BE 的长为 3,求点 A 到直线 l 的距离 AD 的长;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/15/63058c54-23b4-4e61-aa22-f0a69b8bd545.png?resizew=160)
(2)如图 3,当 k=-
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d599cb4a589f90b0205f24c2e1fa021e.png)
M 的坐标;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/15/f7093d5c-791b-4299-a6fe-41e43a199145.png?resizew=145)
(3)当 k 的取值变化时,点 A 随之在 x 轴上运动,将线段 BA 绕点 B 逆时针旋转 90° 得到 BQ,连接 OQ,求 OQ 长的最小值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/15/347ba3d2-0eac-4e5c-b526-851343bdd713.png?resizew=152)
更新时间:2020-02-01 13:30:32
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相似题推荐
解答题-证明题
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【推荐1】如图1,已知点C的坐标是(4
,4
),过点C分别向x轴、y轴作垂线,垂足分别为点B、点D,点E是线段OD上一点(不与点O、D重合),连接BE,作点O关于直线BE的对称点O',连接CO',点P为CO'的中点,连接BP,延长CO'与BE的延长线交于点F,连接DF.
(1)求证:∠PBF=45°;
(2)如图2,连接BD,当点O'刚好落在线段BD上时,求直线BF的解析式;
(3)在(2)的条件下,在平面内是否存在点M,使得以M、O、O'、F为顶点的四边形是平行四边形,若存在,请直接写出点M的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e051d14fd6a787387995331f5e6d026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e051d14fd6a787387995331f5e6d026.png)
(1)求证:∠PBF=45°;
(2)如图2,连接BD,当点O'刚好落在线段BD上时,求直线BF的解析式;
(3)在(2)的条件下,在平面内是否存在点M,使得以M、O、O'、F为顶点的四边形是平行四边形,若存在,请直接写出点M的坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2021/10/18/2832063557648384/2837139544498176/STEM/3aa08df2-6386-4994-b25b-3f93b4e0ad7c.png)
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名校
【推荐2】如图,在平面直角坐标系中,O为坐标原点,点
,射线
交y轴于B,点
在射线
上,满足:
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/13/679f361c-b526-4e0c-a1e6-057d8b48d6cc.png?resizew=341)
(1)求C的坐标;
(2)点P从点A出发沿射线
运动,P的速度为2个单位长度/秒,运动时间为t秒,连接
,
的面积为S,
,用含t的式子表示S,并直接写出t的取值范围;
(3)在(2)的条件下,
,连接
,过点D作
轴于E,P开始运动的同时,动点Q从B出发以1个单位长度/秒的速度向D运动,到达D后再沿射线
运动,
的面积等于S时,求Q的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71ef3fd4967b17d784c170ade802f694.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3b5fe7ff4823684bcbd303eb74833a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/badf8e961b28b0e9ca84650c9729efb4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/13/679f361c-b526-4e0c-a1e6-057d8b48d6cc.png?resizew=341)
(1)求C的坐标;
(2)点P从点A出发沿射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5dd6306e00de2ae82d6605308792db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
(3)在(2)的条件下,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee9cc500fde982b71b92b315cc2e3dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d84acd3c96e20c0ce064aac125f7fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5e6f5230d7ceb56d1668ebda2af9637.png)
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【推荐1】如图,已知直线
交
轴于点
,交
轴于点
,点
,
是直线上的一个动点,以
为边在
上方作正方形
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/28/ea4c6e3a-ef1f-48d9-a397-450ad0b456b9.png?resizew=400)
(1)如图1,若顶点
恰好落在点
处.请直接写出:
①
的长为 ;
②点
的坐标为 ;
(2)在(1)的条件下,求出直线
的函数表达式;
(3)如图2,请画出当正方形
的另一顶点也落在直线
上的图形,并求出此时
点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c98df36e7e055156bf06c90440b00f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1b47e7bf02b3ca16f7d96b9369e51a3.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/28/ea4c6e3a-ef1f-48d9-a397-450ad0b456b9.png?resizew=400)
(1)如图1,若顶点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a7e88b74f492f89e21e4cf65353bdb6.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
②点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)在(1)的条件下,求出直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(3)如图2,请画出当正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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【推荐2】如图,在矩形ABCD中,点O为坐标原点,点B的坐标为(4,3),点A,C在坐标轴上,点P在BC边上,直线ι1:y=2x+3,直线ι2:y=2x-3
(1)求直线l1与x轴的交点坐标T,直线ι2与AB的交点坐标Q和与x轴的交点坐标G;
(2)判定四边形ATGQ的形状并求它的面积;
(3)已知点M在第一象限,且是直线l2上的点,若ΔAPM是等腰直角三角形,求点M坐标
(1)求直线l1与x轴的交点坐标T,直线ι2与AB的交点坐标Q和与x轴的交点坐标G;
(2)判定四边形ATGQ的形状并求它的面积;
(3)已知点M在第一象限,且是直线l2上的点,若ΔAPM是等腰直角三角形,求点M坐标
![](https://img.xkw.com/dksih/QBM/2019/9/23/2296991264342016/2302466146476033/STEM/443d710a0f484a0aabb77c9337827cbb.png?resizew=146)
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【推荐3】通过对下面数学模型的研究学习,解决下列问题:
【模型呈现】
(1)如图,
,
,过点
作
于点
,过点
作
交
的延长线于点
.由
,得
.又
,
,可以推理得到
,进而得到
=______,
=______.(请完成填空)我们把这个数学模型称为“
字”模型或“一线三等角”模型.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/f045d73c-fbb5-48bd-ab2f-07f7945fdbd4.png?resizew=165)
【模型应用】
(2)①如图,
,
,
,连接
、
,且
于点
,
与直线
交于点
,求证:点
是
的中点;
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/8df47f29-9c18-4e92-8391-a71ea155b3bd.png?resizew=165)
②如图,若点
为
轴上一动点,点
为
轴上一动点,点
的坐标为
,是否存在以
、
、
为顶点且以
为斜边的三角形为等腰直角三角形?若存在,请直接写出点
的坐标;若不存在,请说明理由.
【模型呈现】
(1)如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4557ee10ad429943f40252d9bb90565.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0105d0889f6fa9cb5430cf9e09337173.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c79c4d655d22f6b3e9826adc6df810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8492114362cd6d3da1390468baab7aa0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4302919d90dc02f4d80c871e22cd56f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f5e6720c00ee46f8ef8b3417844539.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0105d0889f6fa9cb5430cf9e09337173.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ef41b7ba826b45f1f8adffd3d5a523a.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/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/f045d73c-fbb5-48bd-ab2f-07f7945fdbd4.png?resizew=165)
【模型应用】
(2)①如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95b9150bad7da2a099bd2567403c36e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0105d0889f6fa9cb5430cf9e09337173.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a16dc02090b6e9263555061f14fbc8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26c68515827bdc961adcd6e3f3fa0b0d.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/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/8df47f29-9c18-4e92-8391-a71ea155b3bd.png?resizew=165)
②如图,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7282160df5e93a610b9bbd20f92427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/7c5a3e39-6e8a-40c2-b1bf-817291a9417d.png?resizew=130)
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【推荐1】如图,若一次函数
的图象与
轴,
轴分别交于
,
两点,二次函数
的图象过
,
两点,交
轴另一点
的坐标,顶点为点
,对称轴交
于
,
(1)求抛物线的解析式;
(2)如图1,点
是
上方抛物线上一点.过点
作
轴于
,分别交
、
于
、
,作
于
,
于
,若
,求点
的坐标;
(3)如图2,点
是
上方抛物线上一点.过点
作
轴于
,交
于
,连接
、
,若
中的一个内角是
的2倍,求点
的横坐标
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae652daf6059ff386f99bef2210518c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.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/4c373f804dc6c00e5db92c71ba921d93.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/81dea63b8ce3e51adf66cf7b9982a248.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/17/9bae9b8e-a2ea-45b5-923f-03a49ac1243c.png?resizew=376)
(1)求抛物线的解析式;
(2)如图1,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae95e96ce568efee50145f8d017353df.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92b154270249b0ef54ddb26137b2681a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66fae8e33cd86fa8dab72704eaafe1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/793ebb9e7b90a76dcf3d4582e49ff8f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae95e96ce568efee50145f8d017353df.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0936e532862712045365cb3f63fced9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70ee72b8942479ea23b5246d83c1609e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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解答题-证明题
|
较难
(0.4)
名校
【推荐2】【问题提出】
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/4dff61cc-9b67-4dca-844e-de9dccac3b90.png?resizew=412)
(1)如图1,在矩形
中,
为
边上的动点,
为
的中点,连接
,
,则
的最小值为______;
【问题探究】
(2)如图2,在菱形
中,点
为对角线
上一动点(点
不与
重合),连接
,以
为边作菱形
,且
,连接
.求证:
;
【问题解决】
(3)某小区欲建造如图3所示的四边形
休闲广场.已知
米,在
边上有一个公共则所
,测得
米,在边
上确定点
,沿
修建正方形儿童活动专区
,按规划要求,沿
修建笔直的小路,为了节省成本,要使所修的小路之和尽可能的短,即
的值最小,试求
的最小值.(路面宽度忽略不计)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/4dff61cc-9b67-4dca-844e-de9dccac3b90.png?resizew=412)
(1)如图1,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8737502311861fd36f2da7c6a720fe2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58c826d790b1efb02bbd2acfc3b26e8e.png)
【问题探究】
(2)如图2,在菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76981622e3684aca12435743b6a08a8c.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5bc1dc5d4d3814094ec89fcdf1600e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/494bf14f8369edcb5ba24413e91fd473.png)
【问题解决】
(3)某小区欲建造如图3所示的四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17903dc2ef1c148b50aedd6a5da5badd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ea95119fcd25b355f83408beb488962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/eb73ae3dc9f67bcf303e7c94a37080d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b8dffd659bc657c01cb8cf07591d805.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b8dffd659bc657c01cb8cf07591d805.png)
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