Stage 20 · Coordinates & First Functions

20.3.4 Coordinate Transformations in a Nutshell

20.3 Similarity and Scaling in Coordinates

Point 4 of 4

20.3.4 Coordinate Transformations in a Nutshell

Core idea

Sign flips do symmetry, adding and subtracting does translation, and multiplying does scaling, with each kind of operation handling its own one job.

Module goal. Use whole-plane scaling to understand enlarging and shrinking a shape, and see clearly what multiplying by a ratio means geometrically
eastmath.com · 20.3 Similarity and Scaling in Coordinates · 20.3.4 Coordinate Transformations in a Nutshell