Geometry Problem 576: Unlocking the Power of Centroids: with a Focus on Quadrilaterals, Parallel Lines, and Proportions for High School and Math Education.
Given quadrilateral ABCD with centroids E and F of triangles ABC and BCD respectively, prove that
(1) EF is parallel to AD, (2) the measure of EF is onethird of
the measure of AD.
Problem 576

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