30.1.4 Vectors Back in the Plane: Direction and Coordinates
30.1 From Vectors to Coordinates: Where Analytic Geometry Begins
Point 4 of 4
30.1.4 Vectors Back in the Plane: Direction and Coordinates
Core idea
Flatten last stage's space vectors back onto the page, where a single arrow becomes (a,b) and quietly sets up the direction of a line.
Module goal. Carry the vector thinking forward from the last stage, build the big idea of describing shapes with coordinates and equations, and revisit the tools of the plane.
eastmath.com · 30.1 From Vectors to Coordinates: Where Analytic Geometry Begins · 30.1.4 Vectors Back in the Plane: Direction and Coordinates