如图,在矩形
中,
,
,过对角线
的中点O的直线分别交边
边于点E,F.
是平行四边形;
(2)当
时,求四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c4cd264c97c1f261229925cc5a6761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f3c15b30bd155641e548a7d8c172dd4.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/076a5273440d800b96bfcaaa9970cc45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f3c15b30bd155641e548a7d8c172dd4.png)
更新时间:2024-03-21 06:02:03
|
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解答题-作图题
|
适中
(0.65)
【推荐1】平行四边形的其中一个判定定理是:两组对边分别相等的四边形是平行四边形.请你补全已知和求证,并证明这个判定定理.
已知:如图,在四边形
中,
,_____.
求证:__________.
已知:如图,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
求证:__________.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/18/186297c5-367a-4a6b-8850-8865427bd6af.png?resizew=152)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,
是矩形
的对角线,将
沿
所在的直线向右平移后得到
,连接
,
.
(1)求证:四边形
是平行四边形;
(2)当四边形
是菱形吋,若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e5e61804ce550636a0354e0a78a22d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/11/d71f6225-aa83-4351-940d-f64977b36a6f.png?resizew=157)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec07464a1b5bc7a2cc338b1a13e0f4a6.png)
(2)当四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec07464a1b5bc7a2cc338b1a13e0f4a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efce704c2abda9a42e242333b7d29aaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dc2d2dd56fcc67698c45a6e0e48f80.png)
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解答题-证明题
|
适中
(0.65)
名校
【推荐1】已知:如图,矩形
的对角线
的垂直平分线
与
分别交于点E、O、F.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/17/107db643-7ead-455d-a3c6-3fd981f47523.png?resizew=178)
(1)求证:四边形
是菱形;
(2)若
,直接写出菱形
的面积_________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5ba7daa9f015b044c569a5280f89be1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/17/107db643-7ead-455d-a3c6-3fd981f47523.png?resizew=178)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab954a78760b37cca4c2ead34e72bf8e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e099868a0c9392bc92fa3edf068f827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab954a78760b37cca4c2ead34e72bf8e.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】如图,矩形
中,过对角线
的中点
作
的垂线
,分别交
于点
.判断四边形
的形状,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/d40b319212a7e7528b053e1c7097e966.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d93949d8a15aca4e79cedb978590571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8bdae3d30abf70515bdbd45f9d0c380.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/18/917d8498-42be-419b-be07-5d36c66c9435.png?resizew=161)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在
中,
,
是
的中点,
是
的中点,过点
作
交
的延长线于点
.
![](https://img.xkw.com/dksih/QBM/2020/10/9/2567247341649920/2567884653232128/STEM/3f226efd-a095-4053-acce-16fe97294439.png?resizew=285)
(1)求证:四边形
是菱形;
(2)若
,
,求菱形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa8cee7d2463f6f7d352e8b65f47cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.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)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37914c461ec0784f9f866ab43cee1809.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2020/10/9/2567247341649920/2567884653232128/STEM/3f226efd-a095-4053-acce-16fe97294439.png?resizew=285)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a5a2949b3d520ed03d57126c7d4d8d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d649afbddd907f0dfec1420f02f82fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a5a2949b3d520ed03d57126c7d4d8d.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,在平行四边形
中,
是
的中点,连接
并延长交
的延长线于点
,连接
,且
.
为线段
的中点;
(2)若
,求平行四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67268a9d69ea306031facd555b2f8d59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次