👉 In mathematics, a nonpervertible function is a function that preserves angles. This means that if two points in the plane are given as inputs to the function, and the function returns the angle between those points (i.e., the measure of the arc traced by the point from one input point to another), then it will always produce the same result for any pair of points. For example, consider a circle with center O and radius 1. A nonpervertible function that maps each
