What is another word for three-sided figure?
Pronunciation: [θɹˈiːsˈa͡ɪdɪd fˈɪɡə] (IPA) 
A three-sided figure is commonly known as a triangle. However, there are several other synonyms for this geometric shape, including trigon, triquetra, trilateral, and trinangle. Each of these words denotes a figure that has three sides and three angles, which is a fundamental property of triangles. Trigon is a scientific term used to describe a three-sided figure in trigonometry, whereas triquetra is a Celtic symbol of three interlocking shapes. Trilateral is a formal word used in geometry to describe any three-sided figure, whereas trinangle is a slang term that is not typically used in academic or professional settings. Regardless of the word used, a three-sided figure remains a fascinating and ubiquitous shape in nature and mathematics.
