Each concept here is mapped to its prerequisites — the ideas you'd need first to understand it — all the way down to four foundations: Space, Time, Energy, Pattern. Click any prerequisite to drill down, or scroll for the chain graph.
A plane emerges from the intersection of line and space, where a line's infinite extension in two dimensions defines a flat, two-dimensional surface that exists within the three-dimensional expanse of space.
External reference — all senses of the word “plane” on Wiktionary. This atlas concept maps to only the slice of meaning relevant to the prerequisite graph.