如图,点A,B,E在同一条直线上,正方形ABCD,BEFG的面积分别为m,n,H为线段DF的中点,则BH的长为( )
![](https://img.xkw.com/dksih/QBM/2019/10/10/2309096549908480/2312029740736513/STEM/7776b423325c43c1bd413e95d0eeadf3.png?resizew=185)
![](https://img.xkw.com/dksih/QBM/2019/10/10/2309096549908480/2312029740736513/STEM/7776b423325c43c1bd413e95d0eeadf3.png?resizew=185)
A.![]() | B.![]() | C.![]() | D.![]() |
18-19八年级下·浙江杭州·期末 查看更多[3]
浙江省杭州市萧山区2018-2019学年八年级下学期期末数学试题浙江省宁波市鄞州区部分校2021-2022学年八年级下学期期末考试数学试题(已下线)期末难点特训(一)选填压轴50道-【微专题】2022-2023学年八年级数学下册常考点微专题提分精练(浙教版)
更新时间:2019-10-14 22:59:27
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【知识点】 四边形其他综合问题
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【推荐1】如图,CE是▱ABCD的边AB的垂直平分线,垂足为点O,CE与DA的延长线交于点E.连接AC,BE,DO,DO与AC交于点F,则下列结论:①四边形ACBE是菱形;②∠ACD=∠BAE;③AF:BE=2:3;④S四边形AFOE:S△COD=2:3;以上四个结论中所有正确的结论是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/10/b7270b3d-ffa4-426f-9a91-3fea30460513.png?resizew=199)
A.①② | B.①②③ | C.②④ | D.①②④ |
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【推荐2】如图,在矩形片
中,边
,
,将矩形片
沿
折叠,使点A与点C重合,折叠后得到的图形是图中阴影部分.给出下列结论:①四边形
是菱形;②
的长是1.5;③
的长为
;④图中阴影部分的面积为5.5,其中正确的结论有( )
![](https://img.xkw.com/dksih/QBM/2021/5/21/2725747379888128/2725955215032320/STEM/0b7841c8-386d-404f-9059-25ce8d71c98e.png?resizew=168)
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A.1个 | B.2个 | C.3个 | D.4个 |
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