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posted by Anonymous on Thursday, December 6, 2012 at 7:27pm.
In triangle ABC, centroid D is on the median line segment AM. AD=x+4 and DM=2x-4. Find AM.
AM = AD+DM = x+4+2x-4 = 3x we also know that AD = 2DM, so AM = 3(2x-4) so, 3x = 6x-12 x = 4 AM = 12
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