The Projective Line, Circles and the CQQ Theorem - Part 2

Explore the intricacies of general circles and the Cyclic Quadrilateral Quadrea (CQQ) theorem in this advanced geometry lecture. Delve into projective parametrization and learn how to extend the CQQ theorem proof to various circle types. Examine the sophisticated process of parametrizing real, non-zero circles and the fundamental properties of the unit circle. Gain insights into complex number arithmetic, emphasizing the importance of quadrance over modulus. Investigate signed areas, their transformations, and understand how the CQQ theorem adapts under different conditions. This in-depth exploration bridges projective geometry, complex analysis, and transformational mathematics, providing a comprehensive understanding of circular geometry beyond traditional approaches.

Intro to general circles
Projective parametrization
Extending proof of the CQQ theorem
Different kinds of circles
Parametrizing a real, non-zero, circle
Unit Circle
Basic facts about complex numbers
Signed areas and transforming them
How the CQQ theorem changes under transformation