如图,在正方形ABCD中,E为BC上一点,过点E作EF
CD,交AD于点F,交对角线BD于点G,取DG的中点H,连接AH,EH,FH.下列结论:①FH
AE;②AH=EH且AH⊥EH;③∠BAH=∠HEC;④△EHF≌△AHD.其中正确的个数是( )
![](https://img.xkw.com/dksih/QBM/2022/4/27/2967207187668992/3041727532343296/STEM/58890b40672e4b7a81fbd14a17ef547e.png?resizew=137)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://img.xkw.com/dksih/QBM/2022/4/27/2967207187668992/3041727532343296/STEM/58890b40672e4b7a81fbd14a17ef547e.png?resizew=137)
A.4个 | B.3个 | C.2个 | D.1个 |
更新时间:2022-08-10 21:53:25
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【推荐1】下列命题中,是真命题的是( )
A.面积相等的两个三角形全等; |
B.两边及其中一边的对角对应相等的两个三角形全等; |
C.直角三角形的两个锐角和为90°; |
D.三角形的一个外角等于两个内角的和; |
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【推荐2】如图,在正方形
中,
,G是
的中点,点E是正方形内一动点,且EG=2,连接
,将线段
绕点D逆时针旋转
得到线段
,连接
,则线段
长的最小值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/12/866c5f89-b9ec-44a7-b28e-d3d7f17edbd1.png?resizew=144)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9953aa30372cd9d60d5b53d90d9414a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/12/866c5f89-b9ec-44a7-b28e-d3d7f17edbd1.png?resizew=144)
A.![]() | B.2 | C.3 | D.![]() |
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【推荐1】如图,在
中,
,
,把
绕点A逆时针旋转得到
,点D与点B对应,点D恰好落在
上,过E作
交
的延长线于点F,连接
并延长交
于点G,连接
交
于点H.下列结论:①
;②
;③
;④
.其中正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b6e4a2df58a236c20df5df0d29a466c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c197d8b99f2eb7477947e53461b5d548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9847b9e734dcdbda3f82513e18c6181a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98ed7591c139c7e003434e2afb24f345.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d338db46ac31d88187ca59f6d6344dd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3341d02931bb42f1aafde28a3a87176e.png)
A.4个 | B.3个 | C.2个 | D.1个 |
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【推荐2】如图,四边形ABCD为矩形,依据尺规作图的痕迹,∠α与∠β的度数之间的关系为( )
A.β= 180-α | B.β=180°-![]() | C.β=90°-α | D.β=90°-![]() |
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【推荐1】如图,矩形ABCD中,AB=8,BC=6,对角线AC,BD交于点O,过点O作OG⊥AB于点G.延长AB至E,使BE=
AB,连接OE交BC于点F,则BF的长为( )
![](https://img.xkw.com/dksih/QBM/2019/4/14/2182327780458496/2186037105106944/STEM/e0a6b9756b3e412c9dd848227efd40be.png?resizew=156)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10402e4ddd0d323cc1ae83801ae976db.png)
![](https://img.xkw.com/dksih/QBM/2019/4/14/2182327780458496/2186037105106944/STEM/e0a6b9756b3e412c9dd848227efd40be.png?resizew=156)
A.![]() | B.1 | C.![]() | D.2 |
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【推荐2】如图,
,
是正六边形
的两条对角线,已知四边形
的面积为8,则阴影部分的面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/22/7210c5fe-07cb-4fe0-9ad3-3e66c3174aae.png?resizew=157)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c92d220be10b55272aab5bacd9f69721.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/22/7210c5fe-07cb-4fe0-9ad3-3e66c3174aae.png?resizew=157)
A.2 | B.4 | C.![]() | D.![]() |
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【推荐1】如图,点P是正方形ABCD的对角线BD上一点,
于点E,
于点F,连接EF,给出下列四个结论:①
;②
;③
;④
,其中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac2ef99db257cc1acb08e3a5e0006d49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a760ae07c18788287b9e58b29b85fc54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62f1aadf4291d961038e8db73a1b4098.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/461b5b33f1bee2cee89b70a53bed6f04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88d18e0b20763e76ee99054cf47b2460.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6350abc2bc9e38dca81a52a856c0f61.png)
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】将图1中两个三角形按图2所示的方式摆放,其中四边形
为矩形,连接
,甲、乙两人有如下结论:
甲:若四边形
是边长为1的正方形,则四边形
必是正方形;
乙:若四边形
为正方形,则四边形
必是边长为1的正方形.
下列判断正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/29/63768f3a-522a-4183-ae2e-2b85e94b22d8.png?resizew=201)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
甲:若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ac79e422ba4876949f0514c44539b1.png)
乙:若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ac79e422ba4876949f0514c44539b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
下列判断正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/29/63768f3a-522a-4183-ae2e-2b85e94b22d8.png?resizew=201)
A.甲正确,乙不正确 | B.甲不正确,乙正确 |
C.甲、乙都不正确 | D.甲、乙都正确 |
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