2.1 Picturing 2D vectors2.1.1 Representing 2D vectors2.1.2 2D drawing in Python2.1.3 Exercises2.2 Plane vector arithmetic2.2.1 Vector components and lengths2.2.2 Multiplying vectors by numbers2.2.3 Subtraction, displacement, and distance2.2.4 Exercises2.3 Angles and trigonometry in the plane2.3.1 From angles to components2.3.2 Radians and trigonometry in Python2.3.3 From components back to angles2.3.4 Exercises2.4 Transforming collections of vectors2.4.1 Combining vector transformations2.4.2 Exercises2.5 Drawing with MatplotlibSummary