the ancient greek polykleitos is credited with developing a set of rules about body parts and their relative dimensions that became the standard for creating the ideal figure. what are the rules called?

The Canon

Explanation:

The Canon of Polyclitus was the sculptors´ theoretical method of measurement that suggests there´s an ideal mathematical proportion for each part of the human body.

Created around 450 BCE, the Canon was tested by the making of a statue of Achilles, which despite being destroyed, had artists trying to find by Polykleitos´ unit of measurement through its replicas.