(1)在等边三角形
中,点
分别在
上,
,当
______
时,
为等边三角形.
(2)如图1,在
中,
,求
面积的最大值.
(3)如图2,在一块四边形土地
上,准备搭建光伏基地,基地包含光伏逆变器和光伏太阳能板两个区域,
为光伏逆变器安装区域,阴影部分为光伏太阳能板安装区域,已知基地外围栏
,
,点
在
的中点上,
,
两点为汇流箱接口,
,按照设计要求,光伏逆变器安装区域(即
的面积)需要尽可能大,试求光伏太阳能板的占地面积的最小值.(结果保留根号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/049ba02a6816033ade98e679a59a3b24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1039601edd7326b628a3201a3d4af948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
(2)如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4709927bc8bd9754358c404fc05591ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)如图2,在一块四边形土地
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12225a1a1eda07908309f8100cc34726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7038d2782aaa29f1212a7d4c9d34060b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca9b71be12c008d6b1a88e9e1577e1b5.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0a64888832f66a0cf0a2e63eab47f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12225a1a1eda07908309f8100cc34726.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/20/b18b9d3c-e343-4640-8759-d6755dd8e95d.png?resizew=481)
更新时间:2024-04-02 10:19:11
|
相似题推荐
解答题-问答题
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(0.4)
解题方法
【推荐1】如图,抛物线
与x轴交于A,B两点(点A在点B的左侧),抛物线上另有一点C在第一象限,满足
为直角,且使
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/30/6e663850-ad7a-4911-b508-04c4a32b9676.png?resizew=375)
(1)求线段OC的长;
(2)求该抛物线的函数关系式;
(3)在抛物线的对称轴上是否存在一点P,使得
是以
为腰的等腰三角形?若存在,求出所有符合条件的点P的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc681a91282ff5e405786fd17bf0c3c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a375501962aaf07eea10a0221c282be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913271afd0320a8f9a8488491416bed1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/30/6e663850-ad7a-4911-b508-04c4a32b9676.png?resizew=375)
(1)求线段OC的长;
(2)求该抛物线的函数关系式;
(3)在抛物线的对称轴上是否存在一点P,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/357265c532428e886a643e8e653eec9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
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真题
解题方法
【推荐2】如图,直线x=-4与x轴交于点E,一开口向上的抛物线过原点交线段OE于点A,交直线x=-4于点B,过B且平行于x轴的直线与抛物线交于点C,直线OC交直线AB于D,且AD:BD=1:3.
![](https://img.xkw.com/dksih/QBM/2013/8/5/1573675273764864/1573675280146432/STEM/f03964d98f1e4282ab854f8cd090b068.png)
(1)求点A的坐标;
(2)若△OBC是等腰三角形,求此抛物线的函数关系式.
![](https://img.xkw.com/dksih/QBM/2013/8/5/1573675273764864/1573675280146432/STEM/f03964d98f1e4282ab854f8cd090b068.png)
(1)求点A的坐标;
(2)若△OBC是等腰三角形,求此抛物线的函数关系式.
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【推荐1】已知
为等边三角形,点
为
的垂直平分线上一点,连接
、
,点
、
分别在
、
所在的直线上,连接
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/20/c2b080dc-ead3-45f6-9d66-991386192d96.jpg?resizew=415)
(1)如图①,若
,点
、
在边
、
上,
,则
、
、
之间的数量关系是_______;若
,则
的周长为______;
(2)如图②,点
在
上,
,求证:
;
(3)如图③,点
在边
上,点
在
的延长线上,在(2)的条件下,若
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/20/c2b080dc-ead3-45f6-9d66-991386192d96.jpg?resizew=415)
(1)如图①,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62502b921876586cb2d5ce9aaae4c3d4.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13e2480663d204ce73874197e863163b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
(2)如图②,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/804bec286530f61dc220daf4cbcc52c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b30155e0e3cf7c5146d3311e5b8da93.png)
(3)如图③,点
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17dfb01ed6cac58f10345f2b26f6e262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db3429f328cde5aa2654fcf38c3b6d4c.png)
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【推荐2】已知D、E分别是等边△ABC中AB、AC上的点,且AE=BD,求BE与CD的夹角是多少度?
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名校
【推荐1】如图1,
中,
,
为
上一点,
交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/78c297e0-6b12-4752-8b4a-db56f1ccf25a.png?resizew=340)
(1)求证:
.
(2)如图2,过
作
交
延长线于
,
为
上一点,
,连接
、
.求证:
.
(3)如图3,在(2)的条件下,若
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](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/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/78c297e0-6b12-4752-8b4a-db56f1ccf25a.png?resizew=340)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421291381be28da4bd16560fd383b4a9.png)
(2)如图2,过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe9f641563e8533a5bb39188aa7cc182.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b2f883a2a2e0ccc5089fa9f0661e340.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fda71eb7b5c5562c2cc58a41181ae3b2.png)
(3)如图3,在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05d35d8d8bb0dc17f2f86fe5b230a2b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aabe4e813c123c04d16e7084ab298011.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f09f62d21a23b48fdd35381ebbd3a06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐2】如图1,在
中,点D,E分别是边
上的点,且
,连接
,点F在
上,连接
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/21/6bba31c3-6670-4584-86a7-ebc98d341b1c.png?resizew=342)
(1)求证:
;
(2)如图2,若
,
.
① 求
的值;
② 求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4515e1dff9a852b3294dc1d6488a5748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2d6ceed6e5a36193bcb5a557853dbee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432cf339fdfdd3f3325912035c7b12a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74e46fb91464159b80eab7c28a926b4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/361d6d6eb2e24fd9b16f5dec4a0c9533.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/21/6bba31c3-6670-4584-86a7-ebc98d341b1c.png?resizew=342)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a702c324e0c76150540c3d32df802077.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13430a749d8c4e3ba11b063a20fe0dc8.png)
① 求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4c5e73cd3a61a202ae47006ca5d9ed5.png)
② 求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f0d050fca91c3bed6a2ad6907e6d1f0.png)
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【推荐1】(1)如图1,
为等腰直角三角形,
,求证:
.
(2)如图2,在(1)的条件下,连结
,
,求
的长.
(3)如图3,在
中,
,
分别在直角边
,
上,
,
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb11e1548c61a8ac7e3d2bef119ac3ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd8d3ccd7f28134caf40775d3a91f4ca.png)
(2)如图2,在(1)的条件下,连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6ff3b7f36ee0351ad94e0a8851ff4c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(3)如图3,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2955344250c7d5446e161c01525d32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81b0947e66d250a7c383f40c5337ee0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb0b732912cec85d7818ba891cdf82ed.png)
![](https://img.xkw.com/dksih/QBM/2022/3/18/2938659084779520/2947299336855552/STEM/09c02a20-83ac-4d99-b558-0cd35450e626.png?resizew=553)
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名校
【推荐2】如图,在平面直角坐标系xOy中,已知直线y=
x与双曲线y=
交于A,B两点,且点A的横坐标为2
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/375b674f-d340-43b6-94fe-20e039f56c82.png?resizew=172)
(1)求k的值及点B的坐标;
(2)利用图象直接写出不等式
x≤
的解集;
(3)有一函数的图象是过原点O的一条直线,且与双曲线y=
相交于M,N两点(点M在第一象限),若以点A,B,M,N为顶点的凸四边形的面积为8
,求这个函数的解析式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abb3a62e46296c417261156b51ec6b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/375b674f-d340-43b6-94fe-20e039f56c82.png?resizew=172)
(1)求k的值及点B的坐标;
(2)利用图象直接写出不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abb3a62e46296c417261156b51ec6b4.png)
(3)有一函数的图象是过原点O的一条直线,且与双曲线y=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abb3a62e46296c417261156b51ec6b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
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解答题-问答题
|
较难
(0.4)
【推荐3】如图1,在
中,
,
,
,点P,Q分别是
上的动点,P从C出发以每秒3个单位长度的速度向终点A运动,Q从A出发以每秒8个单位长度的速度向终点B运动,两点同时出发,当其中一点到达终点时整个运动结束,设运动时间为t秒.过点Q作
于点M.
(1)
______,
______.(用含t的代数式表示)
(2)如图2,已知点D为
中点,连接
,以
为邻边作平行四边形
.
①当
时,求
的长;
②在运动过程中,是否存在某一时刻,使得平行四边形
的一边落在
的某边上?若存在,求出所有符合条件的t的值;若不存在,请说明理由.
![](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/56d3c9ce32b721995f355eea411340e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd0763b031b7e6b6d87ce3554ac482d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b9f8ea30554c6eb6b9f32bcb4048e5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5990f8c969b6378b96c66df01d57a74.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/24/6bc3f56b-cd7c-45cf-8772-04106b9054d5.png?resizew=313)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/524f25e1eedbfe399f7f42db890ab89a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d607a752340a3dec81ee90d327844f18.png)
(2)如图2,已知点D为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d12390d8c9afe583faf46c327e3662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d12390d8c9afe583faf46c327e3662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9701f8244eb6e120b909f1d9f9efce65.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/849efadc5a3f5dd6cdc343dba8648571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c118858379800688c993a8b61270b356.png)
②在运动过程中,是否存在某一时刻,使得平行四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9701f8244eb6e120b909f1d9f9efce65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
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