如图,在矩形
中,
为
中点,
过点
且
分别交
于点
,交
于点
,点
是
中点且
,给出以下结论:①
;②
是等边三角形;③
;④
其中正确的有( )
![](https://img.xkw.com/dksih/QBM/2023/7/9/3277070589624320/3283153514708992/STEM/588f2c28634545aa9f1a9fe69a96ab90.png?resizew=137)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8de4a54cc7818be87a239f6de5f5d05b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f09d1c96a41e6fcd9c5afd8af977fd96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd171dc4ef1d225a845cfc947775c9a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ba5d2df59d14af6d0b73a16664806a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3934799007d630a891824657df90a859.png)
![](https://img.xkw.com/dksih/QBM/2023/7/9/3277070589624320/3283153514708992/STEM/588f2c28634545aa9f1a9fe69a96ab90.png?resizew=137)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2023-07-22 17:22:59
|
相似题推荐
单选题
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(0.4)
【推荐1】如图,OE是等边
的中线,
,点C是直线OE上一动点,以AC为边在直线AC下方作等边
,连接ED,下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/2020/11/4/2585827902636032/2588079307194368/STEM/21b9dcb2d24c46b885d8d8153eaa3aee.png?resizew=135)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9466d03bc916a9169eaf39863d59fceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://img.xkw.com/dksih/QBM/2020/11/4/2585827902636032/2588079307194368/STEM/21b9dcb2d24c46b885d8d8153eaa3aee.png?resizew=135)
A.ED的最小值是2 | B.ED的最小值是1 |
C.ED有最大值 | D.ED没有最大值也没有最小值 |
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【推荐2】如图,
为半圆形量角器直径,直角三角板
与半圆形量角器如图放置,其中斜边
与半圆形量角器交于A、
两点,
经过点
,
,若
,
,则
长度是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/333ab24c4935210f4c232cd0c0fae358.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7720a24ccafd483cffe43b95be4ee20d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/27/feb7034b-5e59-4d36-8033-7201e8edae31.png?resizew=161)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,
和
均为等边三角形,直线
交
于点
,点
、
分别为
、
的中点,下列结论:①
;②
;③
;④
为等边三角形;⑤
平分
,其中一定成立的有( )个
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/25/52386956-f299-4c55-9102-752b3372772a.png?resizew=222)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a5e0a51c9e14fb246b0ba0b231c1e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26e59b7c0d4a0b312e674b7bb061240b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3be0c0735a9b9bba2992735fa370098.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0d13e82ad6bdae51f30e2a3dafd630d.png)
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A.1 | B.2 | C.3 | D.4 |
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【推荐2】如图, 点
在线段
上,
, 以
为圆心,
为半径作
, 点
在
上运动, 连结
, 以
为一边作等边
, 连结
, 则
长度的最大值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/9/6a1c7b1b-8c89-4eb4-aa40-e0b813bcf5c5.png?resizew=157)
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您最近一年使用:0次
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【推荐1】如图,在等腰
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是
上两动点,且
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的最小值为( )
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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您最近一年使用:0次
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【推荐2】如图,已知⊙
中,
,
,
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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您最近一年使用:0次
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名校
【推荐1】如图,在
ABCD中,∠ABC=45°,BC=4,点F是CD上一个动点,以FA、FB为邻边作另一个
AEBF,当F点由D点向C点运动时,下列说法正确的选项是( )
①
AEBF的面积先由小变大,再由大变小;②
AEBF的面积始终不变;③线段EF最小值为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e2031d209711b058f3d278ede3c1d33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81a5328919a7cec382c2e91c9c528fc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81a5328919a7cec382c2e91c9c528fc1.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81a5328919a7cec382c2e91c9c528fc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81a5328919a7cec382c2e91c9c528fc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e2031d209711b058f3d278ede3c1d33.png)
A.① | B.② | C.①③ | D.②③ |
您最近一年使用:0次
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【推荐2】如图,矩形
中,
,
,正方形
和正方形
的顶点均在矩形
的边和对角线
上,若正方形
的面积记为
,正方形
的面积记为
,则( )
![](https://img.xkw.com/dksih/QBM/2022/8/17/3046272435257344/3049844929044480/STEM/8e6bcc290f9440b5b1359275afde0c70.png?resizew=160)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d92d5d2adfe12d5edd03e038c0b4e3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d8b79e8117dbbe73418dce43aa08ba4.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ac79e422ba4876949f0514c44539b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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A.![]() | B.![]() |
C.![]() | D.无法比较![]() |
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