Welcome to Episode 11 of Season 3: Unlocking Advanced Topics! This episode focuses on calculating the area and length of complex geometric shapes. It presents conceptual tricks and remarks for breaking down intricate figures, such as extending lines to form simpler shapes like triangles or dropping altitudes. The episode then provides multiple examples and problems, often originating from math competitions like AIME and AMC, that illustrate these techniques. These examples often involve squares, circles, and octagons, requiring the application of concepts like the Pythagorean theorem or splitting lengths into multiple components to solve for area or perimeter.