(In reply to
Can you provide insight? by Dej Mar)
Let ABCD be the quadrilateral.
Let A' be the centroid of triangle BCD.
Let B' be the centroid of triangle CDA.
Let C' be the centroid of triangle DAB.
Let D' be the centroid of triangle ABC.
We want to show that AA', BB', CC', and
DD' are concurrent.

Posted by Bractals
on 20080308 14:42:32 