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[几何] 与重心相关的垂直问题

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lemondian posted 2019-6-25 09:21 |Read mode
在$\triangle ABC$中,若$G$是$\triangle ABC$的重心, $M$是$AB$上的点,$N$是$AC$上的点,且$\vv{AB}=(3-\sqrt{3})\vv{AM}$,$\vv{AC}=\sqrt{3}\vv{AN}$.请问:$CG\perp MN$是否成立?

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kuing posted 2019-6-25 11:35
无非一些简单计算,一算就知道成不成立了,有何难处?

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