如图,在矩形
中,
,
,将矩形ABCD绕对角线中点O逆时针旋转
得到矩形
,当
,D的距离等于1时,α的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13f4bf21d1710f9593b713fad490cc29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1861fb8268e8c6c68afc1b3b9591f92c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d609847e2ff3d64e5a514582c3ead0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/7/260752a4-d684-472b-bd33-e6b390b13b0c.png?resizew=175)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2023-06-07 11:51:13
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【推荐1】如图,在△ABC中,∠BAC=90°,AD是高,BE是中线,CF是角平分线,CF交AD于点G,交BE于点H,下面说法正确的是( )
① △ABE的面积与△BCE的面积相等;② ∠AFG=∠AGF;③ ∠FAG=2∠ACF;④ BH=CH
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/21/8781838a-5e3b-437e-88aa-69ed538fd047.png?resizew=251)
① △ABE的面积与△BCE的面积相等;② ∠AFG=∠AGF;③ ∠FAG=2∠ACF;④ BH=CH
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/21/8781838a-5e3b-437e-88aa-69ed538fd047.png?resizew=251)
A.①②③ | B.②③④ | C.①③④ | D.①②③④ |
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【推荐2】如图,
内接于
,
是
的直径,过点
作
的切线,交
的延长线于点
,若
,则
的度数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0b17b275d892a076f768524c400a6f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5157b42da58d55daad27d98b2fec15ff.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】已知
中,
,以
,
为边分别向外作两个正方形
,正方形
,
,
,分别交
、
于点H,I,连接
,分别交
,
于点P、Q.若
,则
的值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/7/8623a956-6476-4db8-b4a1-73333cf0df22.png?resizew=210)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9d54cbbf601f4583659771eb534997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/364e4c3b68ae4e5b4a2d6fa891a682cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6d5443467eed3bbc319e6b7d7a6945.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc64c4fa9b63774be035744a024ee192.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9020059d62af7498039f091de6f005ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e12f310eebce89b8a728201f7ed135c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4bae23942fb06e1fc785490c39ed31.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/7/8623a956-6476-4db8-b4a1-73333cf0df22.png?resizew=210)
A.![]() | B.![]() | C.4 | D.![]() |
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【推荐2】如图,AB=CD,AB∥CD,E,F是BD上两点且BE=DF,则图中全等的三角形有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/4/004115bd-28e2-454c-8bf4-9d4d4e595b23.png?resizew=180)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/4/004115bd-28e2-454c-8bf4-9d4d4e595b23.png?resizew=180)
A.1对 | B.2对 | C.3对 | D.4对 |
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真题
【推荐1】四边形
为矩形,过
作对角线
的垂线,过
作对角线
的垂线,如果四个垂线拼成一个四边形,那这个四边形为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be23bcd995b65520577f9ffa6b761c8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987ce93f7f5f89cc4db93500327ef68a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
A.菱形 | B.矩形 | C.直角梯形 | D.等腰梯形 |
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【推荐2】如图,在矩形
中,O为
的中点,过点O的直线分别与
交于点E,F,连接
,若
,
,则下列结论中错误 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/5bd38e0d42026b953b2fd2ad3634ecb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45942696810a12ea308c8fb0990da5b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b0c5831ef882a341e1586deeacf5b74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab0b5f3572362e79f379478cfea32943.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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