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Problem 576: Centroid, Triangle, Quadrilateral, Parallel, Measurement.
Level: High School, College, Math Education.

The figure shows a quadrilateral ABCD. E is the centroid of triangle ABC and F is the centroid of triangle BCD. Prove that (1) EF is parallel to AD, (2) the measure of EF is one-third of the measure of AD.

Centroid, Triangle, Quadrilateral



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