2: Vectors In Two Dimensions Last updated Save as PDF Page ID 125027 2.1: Vectors 2.2: Addition, Subtraction, and Scalar Multiplication of Vectors 2.3: Magnitude, Direction, and Components of a Vector 2.4: The Dot Product of Two Vectors, the Length of a Vector, and the Angle Between Two Vectors 2.5: Parallel and Perpendicular Vectors, The Unit Vector 2.6: The Vector Projection of One Vector onto Another