如图,直线
上有三个正方形
,若
的面积分别为9和15,则
的面积为____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://img.xkw.com/dksih/QBM/2021/11/16/2852590181769216/2860176324149248/STEM/61223877-55a3-4177-8e23-0bfd72b0a7f1.png)
更新时间:2021-11-30 23:21:21
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【推荐1】已知:如图所示,等边三角形ABC,点P和Q分别从A和C两点同时出发,它们的速度相同.点P沿射线AB运动,点Q沿边BC的延长线运动,设PQ与直线AC相交于点D,作PE⊥AC于E,当点P在边AB上时,DE:AC=_________
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【推荐2】如图,
过平行四边形
对角线的交点
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
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【推荐1】如图,在平面直角坐标系中,菱形
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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【推荐2】如图,等边
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