四边形ABCD是一张平行四边形纸片,要求利用所学知识作出一个菱形,甲、乙两位同学的作法如图:则关于甲、乙两人的作法,下列判断正确的为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/8/07815190-8829-48b6-a731-66bcf47dd1ea.png?resizew=206)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/8/b9c898ed-e229-4661-b7f2-344e088f56dc.png?resizew=210)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/8/07815190-8829-48b6-a731-66bcf47dd1ea.png?resizew=206)
甲 乙
A.仅甲正确 | B.甲、乙均错误 | C.甲、乙均正确 | D.仅乙正确 |
更新时间:2022-07-08 08:27:58
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【推荐1】如图,已知直线
,BE平分
交直线DA于点E,若
,则
( )
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,
的平分线相交于点F,过点F作
,分别交
于点D,E,那么有下列结论:①
;②
;③
的周长等于
与
的周长之和;④
,
都是等腰三角形;⑤
,其中正确结论的序号有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/20/110d64ce-188b-4fe5-be8d-718a8c07e31a.png?resizew=174)
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A.①②④ | B.④⑤ | C.③④⑤ | D.②④ |
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【推荐1】如图,在
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是
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A.2 | B.4 | C.5 | D.6 |
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【推荐2】如图,
于
于
与
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A.4对 | B.3对 | C.2对 | D.1对 |
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【推荐1】如图,在▱ABCD中,AB=18,AD=12,∠ABC的平分线交CD于点F,交AD的延长线于点E,CG⊥BE,垂足为G,若EF=4,则线段CG的长为( )
![](https://img.xkw.com/dksih/QBM/2019/12/21/2359747009306624/2360848830791680/STEM/09be74f5b8c54f12a56429e04df2442d.png?resizew=266)
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A.2![]() | B.6![]() | C.4![]() | D.8![]() |
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【推荐2】如图.已知四边形ABCD是平行四边形,结合作图痕迹,下列说法不正确的是( )
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A.![]() ![]() |
B.![]() |
C.![]() ![]() |
D.若![]() ![]() |
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【推荐1】下列说法错误的是( )
A.正比例函数![]() |
B.当![]() ![]() |
C.平均数、中位数、众数都刻画了一组数据的集中趋势 |
D.对角线互相垂直的四边形是菱形 |
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【推荐2】依次连接矩形各边中点所得到的四边形是( )
A.平行四边形 | B.菱形 | C.矩形 | D.正方形 |
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