👉 In mathematics, a non-abstract concept is one that does not have a concrete representation or manifestation. Instead, it is represented by abstract concepts, such as numbers, symbols, and objects, which can be thought of in terms of relationships between them. For example, in the context of geometry, a non-abstract concept might be "a plane figure with four sides," whereas in mathematics, this would be represented as "the set of all points that are at a fixed distance from a given point
