Geometry Problems, Online Education

 Problem 149. Quadrilateral, Area, Midpoints.

In the figure below, ABCD is a quadrilateral of area S. E and F are the midpoints of the sides BC and AD respectively. If S1 is the area of quadrilateral AECF, prove that: Quadrilateral area proof. View or post a solution.

Quadrilateral Area, midpoint


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