在平面直角坐标系中,已知平行四边形
的点
、点
,点
,以
为直径画圆,则圆的面积的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/383dd16552157d31cd76783d3d602f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f143b2dcd36d964e81fb7b725de0d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a55b537a5629ac46cd743c5b9097824.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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更新时间:2024-04-11 17:40:35
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【推荐1】对于平面直角坐标系内的任意两点
,
定义它们之间的一种“距离”为
.已知不同三点A,B,C满足
,下列四个结论中,不正确的结论是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d6f5adf13b4214666292dd64b947741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af405a054bfe7fb7ce40e48d816467e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18b977b626c88ca7a9c830cf0c96e41a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b8e80a3b3bbeac368b773228dc801af.png)
A.A,B,C三点可能构成锐角三角形 |
B.A,B,C三点可能构成直角三角形 |
C.A,B,C三点可能构成钝角三角形 |
D.A,B,C三点可能构成等腰三角形 |
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【推荐2】如图,在平面直角坐标系中,
为原点,
,点
为平面内一动点,
,连接
,点
是线段
上的一点,且满足
.当线段
取最大值时,点
的坐标是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cabe14769607dc1d3dd01a7effce7ecb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27718c7561d646d66db48e330332471c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e58d50494e6fcf1a78dd97298f09a066.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37a0397c811fe80c80ecd5b871201987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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【推荐1】在平面直角坐标系xOy中,已知抛物线
与x轴交于A、B两点,与y轴交于C点,D为抛物线顶点.连接AD交y轴于点E,点P在第四象限的抛物线上,连接
交于点G,设
,则w的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f92738aadeac1e3d3d8e919772bce727.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e9117a7f79d043c53779a05848b8ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65002efa11aafdca70ddcad0fd652d5b.png)
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【推荐2】对于坐标平面内的点,先将该点向右平移1个单位,再向上平移2个单位,这种点的运动称为点的斜平移,如点P(2,3)经1次斜平移后的点的坐标为(3,5).已知点A的坐标为(2,0),点Q是直线l上的一点,点A关于点Q的对称点为点B,点B关于直线l的对称点为点C,若点B由点A经n次斜平移后得到,且点C的坐标为(8,6),则△ABC的面积是( )
A.12 | B.14 | C.16 | D.18 |
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【推荐1】如图,在平行四边形ABCD中,∠ABC=45°,E、F分别在CD和BC的延长线上,AE∥BD,∠EFC=30°,AB=1,则CF的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/12/3cdd26cd-9ee1-49ba-aa8d-883ca0e97493.png?resizew=254)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/12/3cdd26cd-9ee1-49ba-aa8d-883ca0e97493.png?resizew=254)
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【推荐2】如图,
为正方形
内一点,过
作直线
交
于点
,过
作直线
交
、
于
,且
.若
.以下结论:①
为等边三角形;②
;③
;④
.其中正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7630a5afafa255d7447c4c44935e4d67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe7c25dea97a44a90554117edcd4c106.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2992a63ac9a38fe54ccc8a6bac4404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0223ac289663445be2fcba982b845159.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d6a2cc463b1fe91ac151633d531d292.png)
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【推荐1】如图,
是菱形
的对角线,
,点E,F是
上的动点,且
,若
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e918b70b02a73685e3c536c7f380e2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57475e9f229bc53a5009eab65bd1da51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4eef107fa9d4cedabdf5906c627cce5.png)
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【推荐2】如图,在平行四边形ABCD纸片中,∠BAD=45°,AB=10.将纸片折叠,使得点A的对应点A'落在BC边上,折痕EF交AB、AD、AA'分别于点E、F、G. 继续折叠纸片,使得点C的对应点C'落在A'F上.连接GC',则GC'的最小值为( )
![](https://img.xkw.com/dksih/QBM/2022/4/14/2957562926481408/2958856153374720/STEM/f9f8aa8c-e775-4e80-b415-45858135dd23.png?resizew=337)
![](https://img.xkw.com/dksih/QBM/2022/4/14/2957562926481408/2958856153374720/STEM/f9f8aa8c-e775-4e80-b415-45858135dd23.png?resizew=337)
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