如图,正方形
的边长为4,G是对角线
上一动点,
于点
,
于点
,连接
,给出四种情况:
①若G为
的中点,则四边形
是正方形;
②若G为
上任意一点,则
;
③点G在运动过程中,
的值为定值4;
④点G在运动过程中,线段
的最小值为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/796b4cd51f5256652220ec2c7a78edb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5afd58cf78512bc596645d2d5a1643fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
①若G为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/920ae90193d50ae60beafae6f2b4ebcd.png)
②若G为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aa712edcfc60a32bed210c8589cabbf.png)
③点G在运动过程中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90367497e5a78214430a9ae95c993ce9.png)
④点G在运动过程中,线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
A.①②③④ | B.①②③ | C.①②④ | D.①③④ |
更新时间:2023-07-31 23:32:21
|
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名校
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【推荐1】如图,直线
与
轴、
轴分别交于点
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,点
是线段
上一动点,过点
作
轴,
轴,垂足分别是点
、
,
,若双曲线
经过点
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【推荐2】如图,以点
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已知:
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![](https://img.xkw.com/dksih/QBM/2020/6/15/2485454148624384/2491013219786753/STEM/f41e38b42a9644878901667d07c7198e.png?resizew=168)
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【推荐1】如图,在正方形
中,E为对角线AC上一点,连接
,过点E作
,交BC延长线于点F,以
为邻边作矩形
,连接
.在下列结论中:
①
;
②
;
③
;
④
.
其中正确结论的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a3f5d73bae2ab3a31c353d38382d25.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/343f75b2c5479c279abca2faed278901.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e79216c6a32bb699aeb36144da020490.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1b3f2aca337a4cf3eef9ad5112a70c.png)
其中正确结论的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/4/41e57e75-9285-491b-9248-f6812c1abce8.png?resizew=199)
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】如图,在正方形ABCD中,点O为对角线AC的中点,过点O的射线OM,ON分别交AB,BC于点E,F,且∠EOF=90°,BO,EF交于点P,甲、乙两人经过研究得到了以下结论:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/25/a12d919a-341b-433a-ba85-71aebead09fc.png?resizew=150)
甲:由△BOE≌△COF,可得到△EOF是等腰直角三角形;
乙:由△AOE≌△BOF,可得到BE+BF=2OA.
以下说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/25/a12d919a-341b-433a-ba85-71aebead09fc.png?resizew=150)
甲:由△BOE≌△COF,可得到△EOF是等腰直角三角形;
乙:由△AOE≌△BOF,可得到BE+BF=2OA.
以下说法正确的是( )
A.甲的原因正确,结论不正确 |
B.乙的原因正确,结论不正确 |
C.甲的原因和结论都不正确 |
D.乙的原因和结论都正确 |
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