Triacontagon refers to a polygon with 30 sides and 30 angles. While it may not be a commonly used term in everyday conversation, there are a variety of synonyms that can be used to describe this shape. Some possible options include a 30-gon, a thirty-sided polygon, or a hecatontagon (which is a Greek term for a hundred-sided polygon, but can also refer to any polygon with a number that ends in -contagon). Other potential synonyms for a triacontagon might include a thirtieth degree polygon or a icosatetragon (which combines the Greek words for twenty and four to describe a shape with 24 sides).