Dive into a comprehensive 6-hour tutorial on Circle Geometry presented by Eddie Woo. Explore fundamental concepts such as finding the center of a circle passing through three points, tangent and radius perpendicularity, and components of a circle. Master angle properties, cyclic quadrilateral characteristics, and the Angle in the Alternate Segment Theorem. Tackle challenging HSC-level questions, covering topics like similar triangles and radius calculations. Examine chord properties, tangent characteristics, and intercept properties through detailed proofs and examples. Investigate congruent triangles in circles, opposite angles in cyclic quadrilaterals, and complex scenarios involving overlapping circles and collinear points. Conclude with an in-depth study of circle tangents, their properties, and practical applications in geometric proofs.