She answered that it looks like an oval now but it is still a circle. What was Abe demonstrating?

Abe was likely demonstrating the concept of perspective or perception in geometry. By stating that it looks like an oval but is still a circle, he may have been illustrating how objects can appear different based on the viewer's angle or the way they are observed, emphasizing the distinction between visual appearance and actual shape. This could relate to discussions in mathematics about the properties of shapes and their representations.