如图,在菱形ABCD中, AD=
,∠BAD=60°, 点P是对角线AC上的动点,点E是AB的中点,连结PB、PE,则PE+PB的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/15/37f123b0-7a2c-4ce7-a53b-0bf8f89a0915.png?resizew=186)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2020-08-20 03:59:50
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【推荐1】如图,矩形ABCD中,AB=4,∠ABD=60°,P、K分别是BD、AD上的点,则PA+PK的最小值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/20/279eb80e-cbf2-486a-9503-3b3e7fbc0dcb.png?resizew=222)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/20/279eb80e-cbf2-486a-9503-3b3e7fbc0dcb.png?resizew=222)
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【推荐2】如图,长方体的长为15cm,宽为10cm,高为20cm,点B离点C5cm,一只蚂蚁如果要沿着长方体的表面从点A爬到点B去吃一滴蜜糖,需要爬行的最短距离是( )cm.
![](https://img.xkw.com/dksih/QBM/2020/9/4/2542454558572544/2543740665233408/STEM/83788aa9e5cc4746b5968c3097127a2f.png?resizew=109)
![](https://img.xkw.com/dksih/QBM/2020/9/4/2542454558572544/2543740665233408/STEM/83788aa9e5cc4746b5968c3097127a2f.png?resizew=109)
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【推荐1】如图,矩形
中,对角线
,
交于点O.若
,
,则
的长为( )
![](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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc1eb76fe74cba30f7cbcde349ba80da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71e6ea7333dbc78d0a7b9bc3892f940.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/24/a762fb00-c376-4ddb-8d4a-32fd283df254.png?resizew=161)
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【推荐2】如图,扇形
中,
,将扇形
绕点B逆时针旋转,得到扇形
,若点O刚好落在弧
上的点D处,则
的值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/14/dc46c56f-6d62-4318-a0c9-0d85a4db5caa.png?resizew=141)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ccc37b189fa2cbc269ca0b233dac37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4739afd7311501e948aa4e1e5c1cb17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d8c176e0c2b435675a3b8efab0e498d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/14/dc46c56f-6d62-4318-a0c9-0d85a4db5caa.png?resizew=141)
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【推荐1】如图所示,在菱形
中,
,点E,F分别为边
上的点,且
,连接
交于点
,连接
交
于点O,则下列结论:①
;②
;③
;④
.其中正确结论有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/10/744e89f6-cf22-4fcf-81ef-dd2a26ec8c3a.png?resizew=174)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4515e1dff9a852b3294dc1d6488a5748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04f8eebda19eded2b059774a8c2666c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25565a18af9687f0eb931cddd0e711ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7755cad7aa7c2b6baf04fd99311f8c1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdbb1fe0998e595c6e9cf59beca1c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46b7029e8eeb176de7862059587d1f29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b1b8635d57a08b4253149ff7e5faaf0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/10/744e89f6-cf22-4fcf-81ef-dd2a26ec8c3a.png?resizew=174)
A.①②③④ | B.①②③ | C.②③④ | D.①③④ |
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【推荐2】如图,
是平行四边形,对角线
在
轴正半轴上,位于第一象限的点
和第二象限的点
分别在双曲线
和
的一个分支上,分别过点
做
轴的垂线段,垂足分别为点
和
,则以下结论:①
;②阴影部分面积是
;③当
时,
;④若
是菱形,则
.其中正确结论的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/647ac042da183e6ec9e3db8a66bb1a0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23d9dd285a463e3610b5292a13949d99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a1355d96e31c41efe988488c0a461d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942f08673c32ec0b957bc8309fb07bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83d200a411fbc2f50ad72f1fd729a7d7.png)
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【推荐1】如图,已知平行四边形
中,
为
上任意一点(可以与
重合),延长
到
,使得
,以
为边作平行四边形
,则
长度的最小值为( )
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712426242031616/2718849698988032/STEM/28a6c2e1-16b1-44f3-9f3e-4f398b7f1b89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef5590b33dc479c85ba3288827128cf9.png)
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【推荐2】如图,等边
的边长为
,以
为圆心,
为直径的半圆经过点
,连接
,
相交于点
,将等边
从
与
重合的位置开始,绕着点
顺时针旋转
,交点
运动的路径长是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/4/a3ac96d1-ebcf-4a89-a96f-dc7aa2de7609.png?resizew=180)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b8189f7b0ffe4d20bf0fad43b4ed589.png)
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