What did the greeks use to establish ideal proportions in the human body architecture and other forms of art

A. chiaroscuro

B. the rule of thirds

C. radial symmetry

D. the golden mean

D. The golden mean, most often call it the Golden Section, Golden Ratio, or Golden Mean, but it's also occasionally referred to as the Golden Number.

The answer is "D. the golden mean".

The ideal of proportion that was utilized by old Greek architects in outlining sanctuaries was not a basic scientific movement utilizing a square module. The math included a more mind boggling geometrical movement, the purported Golden mean. The proportion is like that of the development examples of numerous winding structures that happen in nature, for example, rams' horns, nautilus shells, plant fronds, and vine ringlets and which were a wellspring of enlivening themes utilized by antiquated Greek engineers as especially in prove in the volutes of capitals of the Ionic and Corinthian Orders.