如图,在四边形
中,对角线
,
相交于点
,且
,OB=OD,下列结论不一定成立的是( )
![](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/9a23f35ebcd9799d82c1e41c09781a4c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2021-07-07 14:41:34
|
【知识点】 利用平行四边形性质和判定证明解读
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【推荐1】如图,在平行四边形ABCD中,AC、BD相交于点O,点E是OA的中点,连接BE并延长交AD于点F,已知S△AEF=3,则下列结论:①
=
;②S△BCE=27;③S△ABE=12;④△AEF∽△ACD.其中一定正确的是()
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/13/74b6af8b-98c8-4fad-b8ad-d62a9b1e0fb7.png?resizew=180)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929e72e9d26c3bda1fba680ca48cd95d.png)
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A.①②③④ | B.①④ | C.②③④ | D.①② |
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【推荐2】在平行四边形
中,点
分别是边
的中点,
分别交
于点
,请判断下列结论,其中正确的结论有( )
①
;②
; ③
;④
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/242b88a92c3f78aab24d2cc6944c53ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa16498b83d2df4608888d3f4466e2cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaedb59b442983718f9c992ba94b8822.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89928ff3371d3434ab53cd248a103c24.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/9/20b3e320-b318-47c4-86b7-d5de7fd88c5e.jpg?resizew=225)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/550b15375a54ce849585b60bc42d2dd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e317c69d692137a4ccb626a9ba47718.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70c129397d481beba80d0251fa926fdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9db937afbab9e16fe9ed801ec16fbbb1.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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