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spam18

spam18

Member Since 15-11-2012
Offline Last Active 25-11-2012 - 21:42
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Chứng minh $2S \triangle AED = S\triangle ACB$

15-11-2012 - 18:07

Cho hình vẽ, với $AD . AE = \frac{AB . AC}{2}$. Chứng minh $2S_{AED} = S_{ACB}$

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