Is it true that Naturalistic observation combined with mathematical calculation describes classical Greek figures?

Yes, naturalistic observation combined with mathematical calculation played a significant role in the depiction of classical Greek figures. Artists and sculptors, such as those from the Hellenistic period, often studied human anatomy and proportions, using mathematical principles like the Golden Ratio to achieve idealized forms. This approach allowed them to create lifelike representations that emphasized beauty and harmony, reflecting the Greeks' pursuit of realism and aesthetic perfection in art.