![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b3fb2da3909e643ef238b8d0ac559e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4328da3d85bd60f074efba696260067.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0d54431bbb28ebd98db5c1dc6083a75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c716cd8b6e5e069f5c391d7c7ddf214.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/761e8ff96c96ac26682b521288a01bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdd58653fb6810e60c94191313ad8edf.png)
更新时间:2016-12-04 06:12:14
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【知识点】 平面向量基本定理的应用解读
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适中
(0.65)
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解题方法
【推荐1】莱洛三角形,也称圆弧三角形,是一种特殊三角形,在建筑、工业上应用广泛,如图所示,分别以正三角形
的顶点为圆心,以边长为半径作圆弧,由这三段圆弧组成的曲边三角形即为莱洛三角形,已知
两点间的距离为2,点
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【推荐2】
中,
,
,
,
是边
上一点,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38c4f11dba9549f46b70b82af018bb14.png)
______ .
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