1 . 如图,分别以平行四边形
的边
和
为直角边,向平行四边形
内作等腰
和等腰
,在
的斜边
、
的斜边
上分别取点
,连接
,四边形
为正方形,若平行四边形
的面积为4,则
的面积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1a3b94566843e92ce775ff6bdf386fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6623bca02b89f5aa652fb400a37afa26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5df7626240940eb340420a605e95aeee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47a5926f60339afee638ac1429b8762b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a7bd1b539e1c317223f1948a30531ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05a270ec7e23fc0cc1d4b04bf1d22184.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
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2 . 如图,将平行四边形沿
折叠,点
的对应点恰好为
边上的三等分点
(
),若
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f79997547fb75e88ad1e2c66989a4a0.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3cbd4ad62c52b44e1297d450ab9f950.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3568f51bde4e391c8f08ff3d55989aef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f79997547fb75e88ad1e2c66989a4a0.png)
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真题
3 . 在平行四边形
中,
是锐角,将
沿直线
翻折至
所在直线,对应点分别为
,
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afcce17e4c333353b8b694d0713a581e.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9499868e699c4f9971e7b7e21db28223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afcce17e4c333353b8b694d0713a581e.png)
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4 . 在
中,
,
,点B到
的距离为4,P为边
上一点,Q为
边上的一点,连接
,
,
,若
,且
,则
的长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.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/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac735064f444bdebeae69fae58d8c3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c733cc6d1f5135d7bad17dae362b010a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
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5 . 在平面直角坐标系中,平行四边形
的三个顶点:点
,点
,点
.用含a,b,m,n的式子表示点B的坐标是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/685d31faa9b3bc099e4c5a11b80088f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c65d3d6119b18fd2427497cbd413c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/000a40db9f8553dd6e32d377b34be919.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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6 . 如图,点C是直线
上一点,以为直径作
,过点A作
的切线交
于点D,且
.
的三等分点;
(2)当
的半径为6时,点E是
上一点,填空:
①当以C,D,O,E为顶点的四边形是平行四边形时,
;
②当四边形
为矩形时,
的长度是 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a03e0d9ec888c1c343853295c40318b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
①当以C,D,O,E为顶点的四边形是平行四边形时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404728d0ea2699c71e674f30dd984abd.png)
②当四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72a5857d3f49d365e7c3b46eae3baf4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8192018a58bb1fe23769a48a4d9042ed.png)
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7 . 在学习特殊的平行四边形时,我们发现正方形的对角线等于边长的
倍,某数学兴趣小组以此为方向对菱形的对角线和边长的数量关系探究发现,具体如下:如图1.
四边形
是菱形,
,
,
.
.
又
,
,
______+______.
化简整理得
______.
【类比探究】
(2)如图2.若四边形
是平行四边形,请说明边长与对角线的数量关系.
(3)如图3,四边形
为平行四边形,对角线
,
相交于点
,点
为
的中点,点
为
的中点,连接
,若
,
,
,直接写出
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727dd3bd6a73279286704844a7561599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0944865f14b13a772526c4cae4f29c99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b9ea68dbddf33f0fed8f35a1fd5c90b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52bb5db52f66ddca71e4bd3eaa947dc4.png)
又
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38346c1d9963eb4b5760e40d1b94c843.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e41ae59cdd596380032566219e5f90c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a60385c8677365cac85be9228279fe4.png)
化简整理得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acb11258c0ab2cfc4107bd261816e8dc.png)
【类比探究】
(2)如图2.若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(3)如图3,四边形
![](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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](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/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71e6ea7333dbc78d0a7b9bc3892f940.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd0763b031b7e6b6d87ce3554ac482d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
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8 . 如图是某厂家的图标,小明在研究时发现这个图标的四个角都是正方形,中间是一个平行四边形(A,E在同一水平线上),若
,
,则
的周长是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f3810f7b29d754f5fc2e751e5a96a63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/decaaa999bfb7d74d1d69a3dd2be0a92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69cd259a25336b262a13e10c506688c6.png)
A.4 | B.![]() | C.4+2cosα | D.![]() |
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9 . 图①、图②均是
的正方形网格,每个小正方形的顶点称为格点,在给定的网格中,分别按下列要求画图,保留作图痕迹.
的端点均在格点上,以
为边画一个四边形
,使四边形
为中心对称图形,顶点均在格点上且对称中心为点O;
(2)在(1)问的前提下,点M是线段
上一点,在图①中你所画的四边形
的边
上画一点N,使得
.
(3)如图②,点A,B是直线m上的两个点,请在直线n上作出线段
,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7954493b61c1d19b8bfe3a0745ad5fa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
(2)在(1)问的前提下,点M是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6f2e91007fc5e0538915adc08c0fd26.png)
(3)如图②,点A,B是直线m上的两个点,请在直线n上作出线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df4a2a127d89d50d3fde881a9b58ef0c.png)
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10 . 在平面直角坐标系中,抛物线
(a、b为常数且
)的顶点坐标为
.
(1)求a、b的值;
(2)求抛物线与x轴的交点坐标;
(3)不重合的两点M、B在此抛物线上,点M的横坐标为m,
轴,点B关于点M的对称点为点D,连接
、
,点A的坐标为
,以
、
为邻边构造
;
①当M在抛物线的对称轴的右侧,点D落在坐标轴上时,求
的面积;
②当抛物线在
的内部(不含
的边界)的部分的y值随x的值的增大而增大或随x的值的增大而减小时,直接写出m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53be61cd85ec86aabd164cae0265246b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8a75aaf2b96de353cd12cc51f69e480.png)
(1)求a、b的值;
(2)求抛物线与x轴的交点坐标;
(3)不重合的两点M、B在此抛物线上,点M的横坐标为m,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51f3d19ac94cbb2d45c98b6686922ef1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c151414dc14889e5ead683fd960b075a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
①当M在抛物线的对称轴的右侧,点D落在坐标轴上时,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
②当抛物线在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
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