如图,等边
的边长为12,
是
的高,点E为高
上的动点,连接CE,将
绕点C顺时针旋转60°得到
. 连接
,则下列说法中不正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63c656128dbf114c2b52ceb5a2d2ad3d.png)
A.![]() | B.线段![]() ![]() |
C.![]() ![]() | D.若![]() ![]() ![]() |
更新时间:2024-05-09 08:44:08
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【推荐1】如图,在四边形ABCD中,∠A=∠C=90°,AB=AD.若这个四边形的面积为16,求BC+CD的值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/2/6ee536d2-5505-49c5-95c3-14090f799f36.jpg?resizew=112)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/2/6ee536d2-5505-49c5-95c3-14090f799f36.jpg?resizew=112)
A.6 | B.8 | C.![]() | D.![]() |
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【推荐2】如图,在四边形
中,对角线
平分
,
,下列结论正确的是( )
![](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/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deb6694f3443cc5f4d09948679251b61.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/5/06399648-5711-4f5b-8a80-1e01e7e29261.png?resizew=151)
A.![]() | B.![]() |
C.![]() | D.![]() ![]() |
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【推荐1】如图,在等边三角形
中,
,
,
,垂足分别为点
、
.
为
中点,
为
中点.连接
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,矩形
中,O为
中点,过点O的直线分别与
、
交于点E、F,连接
交
于点M,连接
、
.若
,
,则下列结论:①
垂直平分
;②
;③
;④
.其中正确结论的是( )
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fe6d389a6c448d92b79d89bc9e8489f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4424715955fe48181176de5764bd1525.png)
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A.①②③④ | B.①③④ | C.①③ | D.②③ |
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【推荐1】如图,在
中,
,
,
,
是斜边
上两点,且
,将
绕点
顺时针旋转
得到
,连接
.有以下结论:①
;②
;③当
时,
.其中正确的结论是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/13/4c3944d2-7bf5-42b1-8c6e-925a56a588fd.png?resizew=170)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fbc9876a8df4392f34fbc31d0a9c789.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f25e0f86268ea23d1d1b4bd4d10a60f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/024dc2ccbbe321774df5d44e8785b203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc39461ca7b029d79f2df23c01a789ae.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/13/4c3944d2-7bf5-42b1-8c6e-925a56a588fd.png?resizew=170)
A.①② | B.①③ | C.②③ | D.①②③ |
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【推荐2】如图,在
中,
,将
绕点C顺时针旋转得到
,其中点
与点A是对应点,点
与点B是对应点.若点
恰好落在
边上,则点A到直线
的距离等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc71b8b101edd36cff1aae608ce12249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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A.![]() | B.![]() | C.3 | D.2 |
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【推荐1】如图,在正方形ABCD中,E,F分别为BC,CD的中点,连接AE,BF交于点G,将△BCF沿BF对折,得到△BPF,延长FP交BA延长于点Q,下列结论正确的有( )个.
①AE⊥BF;②QB=QF;③FG=
AG;④sin∠BQP=
;⑤SECPG=3S△BGE
![](https://img.xkw.com/dksih/QBM/2019/7/9/2243124423286784/2243313136156672/STEM/3907927807fe41c18ba6480974be32f3.png?resizew=167)
①AE⊥BF;②QB=QF;③FG=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
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![](https://img.xkw.com/dksih/QBM/2019/7/9/2243124423286784/2243313136156672/STEM/3907927807fe41c18ba6480974be32f3.png?resizew=167)
A.5 | B.4 | C.3 | D.2 |
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【推荐2】如图,AB是⊙O的直径,弦CD⊥AB于点E,且E为OB的中点,∠CDB=30°,CD=4
,则阴影部分的面积为()
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A.π | B.4π | C.![]() | D.![]() |
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