Trigonometry: Solving for a Side The word ‘trigonometry’ is derived from the Greek words ‘tri’(meaning three), ‘gon’ (meaning sides) and ‘metron’ (meaning measure). Trigonometry is the study of relationships between the sides and angles of a triangle.Applications of trigonometry: There are an enormous number of uses of trigonometry and trigonometric functions. … [Read more...] about Trigonometry: Solving for a Side