👉 In mathematics, a trigonid is a series of numbers that are related to the unit circle. It is an infinite sequence of angles that form a regular polygon (a polygon with all sides and all angles equal). The terms in this series can be defined as follows: 1. 0 degrees: This is called the zero angle. 2. π radians: This is the radian measure, which we use to measure angles on the unit circle. 3. 90 degrees: This is