如图,矩形
的对角线
、
相交于点O,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/b33021e7-0138-4164-8c9d-8c5500d710f1.png?resizew=242)
(1)求证:四边形
为菱形;
(2)连接
交
于点F,求证:
平分
.
![](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/ca14fa885a9d04f04e0418b49b118241.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1f406b3ff8561a371a39908fd813f4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/b33021e7-0138-4164-8c9d-8c5500d710f1.png?resizew=242)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5a6e2ab0a2c893dc495df33e5ee092d.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
2023九年级·全国·专题练习 查看更多[2]
更新时间:2023-02-28 09:36:30
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在
中,
是
上一点,过点
作
的平行线交
的平分线于点
,交
的外角
的平分线于点
.
![](https://img.xkw.com/dksih/QBM/2022/12/20/3135055997345792/3135800833867776/STEM/d4c88a58fa0e41008109436e806b0c38.png?resizew=173)
(1)求证:
.
(2)连接
,
,点
可在
上移动,若四边形
是矩形,则点
在
的什么位置?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246a86f34603eaf2e6a948681b831b0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2022/12/20/3135055997345792/3135800833867776/STEM/d4c88a58fa0e41008109436e806b0c38.png?resizew=173)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf2e3236ea30ee2c37928b98041f13a.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff00078112960e401c33516219273549.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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解答题-证明题
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适中
(0.65)
【推荐2】如图,矩形ABCD的对角线相交于点O,
,
,连接BE.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/10/25487096-b84e-4d6a-aece-71ef450903ad.png?resizew=233)
(1)求证:四边形OCED是菱形;
(2)若∠AOB=60°,AB=2,求BE的长,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90e2cf0a72fdf56e3d4eb64e04ea4ccb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1f406b3ff8561a371a39908fd813f4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/10/25487096-b84e-4d6a-aece-71ef450903ad.png?resizew=233)
(1)求证:四边形OCED是菱形;
(2)若∠AOB=60°,AB=2,求BE的长,
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解答题-问答题
|
适中
(0.65)
【推荐1】如图,在正方形
中,点
、
分别在
和
上,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/8/e8038cba-00fd-463c-b482-9bec0155b5f1.png?resizew=163)
(1)
与
有怎样的数量关系,并说明理由.
(2)连接
交
于点
,延长
至点
,.使
,连接
,
,判断四边形
是什么特殊的四边形,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.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/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d38d97f03faed3152db2fd3bd1919944.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/8/e8038cba-00fd-463c-b482-9bec0155b5f1.png?resizew=163)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a679040c4d556723e482bacbab41356d.png)
(2)连接
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6967ebd791092c62b4ef97924d91883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5de44310b7ae22de1884a47ec9811fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f30cb81835298cb612a828f355060a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0234cd0cb930b3179609d289c90e22cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87f0082cda6901a2d7c1f392ddc106b.png)
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名校
【推荐2】如图,△ABC中,AB=AC,∠BAC=40°,将△ABC绕点A按逆时针方向旋转100°.得到△ADE,连接BD,CE交于点F.
(2)求∠ACE的度数;
(3)求证:四边形ABFE是菱形.
(2)求∠ACE的度数;
(3)求证:四边形ABFE是菱形.
您最近一年使用:0次