Math: Geometry Problem 1007:
Hexagon, Midpoint, Triangle, Median, Centroid,
Concurrency. Level: School, College.
The figure shows a hexagon ABCDEFG.
M1, M2, M3, M4, M5,
and M6, are the midpoints of sides. Prove that the medians of
triangles M1M3M5 and M2M4M6 are concurrent at O.

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