Final answer:
Without additional context for the '8' in the square and the '8' in the circle, it is not possible to answer the question definitively. The provided reference statements discuss various unrelated mathematical concepts, but they do not clarify the relationship between the two values of '8'.
Step-by-step explanation:
The question appears to be missing essential information that would allow it to be answered properly, such as the context for the '8' in the square and the '8' in the circle. Without additional information regarding the representation or the mathematical problem at hand, it is impossible to determine the relationship between the two values of '8'. Typically, in mathematics, numbers or symbols within different shapes can represent different variables or values contingent on the defined conditions of a problem. However, none of the provided reference statements seem directly connected to the initial question, making it difficult to provide a definitive answer.
From the reference statements provided, we can discuss related mathematical concepts, such as perpendicular lines forming 90° angles, multiplication being the inverse operation of division, and the proportional relationship between the squares of periods and the cubes of distances in planetary motion (Kepler's third law). These concepts underscore the diverse relationships and principles that exist within mathematics, but they do not offer a clear solution to the initial query about the value of '8' in different shapes.