MathDB
2017 Geometry #4: Quadrilateral Finding MN^2-PQ^2

Source:

February 19, 2017
geometry

Problem Statement

Let ABCDABCD be a convex quadrilateral with AB=5AB=5, BC=6BC=6, CD=7CD=7, and DA=8DA=8. Let MM, PP, NN, QQ be the midpoints of sides ABAB, BCBC, CDCD, DADA respectively. Compute MN2āˆ’PQ2MN^2-PQ^2.