如图1,点P从菱形的顶点A出发,沿
以1cm/s的速度匀速运动到点B,点P运动时
的面积
随时间
变化的关系如图2,则a的值为( )
A.![]() | B.![]() | C.![]() | D.9 |
更新时间:2024-03-21 13:03:20
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【推荐1】如图1,点
从菱形
的边
上一点开始运动,沿直线运动到菱形的中心,再沿直线运动到点
停止,设点
的运动路程为
,点
到
的距离为
到
的距离为
,且
(当点
与点
重合时,
),点
运动时
随
的变化关系如图2所示,则菱形
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐2】如图,已知A、B是反比例函数
)图像上的两点,
轴,交y轴于点C,动点P从坐标原点O出发,沿O→A→B→C匀速运动,终点为C,过点P作
轴,
y轴,垂足分别为M、N. 设四边形
的面积为S,点P运动的时间为t,则S关于t的函数图像大致为( )
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【推荐1】如图,是一张边长为2的正六边形纸版,连接对角线,则阴影部分的面积是( )
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【推荐2】如图,直线l上有三个正方形a,b,c,若a,c的面积分别为5和11,则b的面积为( )
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【推荐1】如图1,点P是菱形ABCD的对角线AC上一动点,E是边BC的中点,连接PB,PE.设点A和点P之间的距离为x,
,图2是点P从点A运动到点C时,y随x变化的关系图象,则图象最低点的纵坐标是( )
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【推荐2】如图,已知
的半径是2,点
在
上,若四边形
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