Explore the Cyclic quadrilateral quadrea (CQQ) theorem in this 22-minute mathematics video. Delve into a major re-evaluation of Brahmagupta's classical theorem on cyclic quadrilateral areas, combined with Robbins' formula for non-convex cyclic quadrilaterals. Examine numerical illustrations in both convex and non-convex cases, engage in algebraic exercises, and perform satisfying numerical calculations. Cover topics including cyclic quadrilaterals, Brahmagupta and Robbins formulas, rational examples, quadratic equations, and solutions for non-convex quadrilaterals. Gain deeper insights into this fundamental geometric concept through rigorous mathematical analysis and practical examples.