Posted by Anonymous on Thursday, November 5, 2009 at 9:41pm.
In triangle ABC, centroid D is on median line. AD=x+4 and DM=2x4. Find AM

9th grade  Reiny, Thursday, November 5, 2009 at 10:50pm
The centroid divides a median in the ration of 2:1, the longer part towards the vertex.
so (x+4)/(2x4) = 2/1
solving....
x = 4
then AM = x+4 + 2x4
= 3x
= 12