Explore the Cyclic quadrilateral quadrea (CQQ) theorem in this comprehensive video lecture. 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 explicit examples of both convex and non-convex situations, and discover the CQQ theorem. Learn about 'real number' examples, Robbin's formula, and the pitfalls of sloppy 'real number' thinking. Gain valuable tips and guidelines for understanding this complex topic, and uncover the intricacies of the Cyclic quadrilateral quadrea theorem.