已知等边三角形的边长为
,则用边长
表示等边三角形的面积
的函数表达式为______ .
![](https://img.xkw.com/dksih/QBM/2016/1/8/1573950695817216/1573950701928448/STEM/ffd608d38bb642a2ae450938cd5dea34.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2016/1/8/1573950695817216/1573950701928448/STEM/ffd608d38bb642a2ae450938cd5dea34.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2016/1/8/1573950695817216/1573950701928448/STEM/cb4bee6431fc46519430051e253d8f09.png?resizew=15)
更新时间:2016-12-06 03:53:48
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【推荐1】如图,等边三角形
的边长为16,动点
从点
出发沿
运动到点
,连接
,作
,
交
于点
.①若
,则
的长为________ ;②动点
从点
运动到点
时,点
的运动路径长为________ .
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【推荐2】如图,等边
中,E是
边的中点,
是
边上的中线,P是
上的动点,若
,则
的最小值为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/1/092bab91-0815-4598-bce5-e8f9f8fd340f.png?resizew=115)
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【推荐1】如图,在
中,
是
边上的高,已知
,
,
,
上方有一动点
,且点
到
,
两点的距离相等,则
周长的最小值为 ______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐2】如图,在
中,
,
的垂直平分线交
于点
,交
于点
;
的垂直平分线交
于点
,交
于点
,连接
,
.若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e80bb0f244f283cd4c3faf809ba488d.png)
________
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐1】如图是二次函数
的图象的一部分,根据图象回答下列问题:
(1)①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
______ ;②方程
的解是______ .
(2)设抛物线的顶点是P,与x轴的另一个交点是B,那么
的面积是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff7fc26a538eca96148ec52af844cc7e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/15/4c8168f4-6d09-490d-8c9c-5fc554939411.png?resizew=236)
(1)①
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66250b43a1724781845ae8d128ceb9ee.png)
(2)设抛物线的顶点是P,与x轴的另一个交点是B,那么
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【推荐2】如图,在平面直角坐标系
的第一象限中,一次函数
的图象与反比例函数
的图象交于
,
两点.
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(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
______ ;
(2)若直线
轴,交一次函数与点
,交反比例函数与点
,当点
在点
的上方时,
面积的最大值是______ .
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(1)
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(2)若直线
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1f0417d8269f01d8e0bc1a8756e2ac.png)
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