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10 cards from this deck
Magnitude (size) and direction
∣a∣=a12+a22|\mathbf{a}| = \sqrt{a_1^2 + a_2^2}∣a∣=a12+a22
Component-wise: add corresponding components
Does not change direction
Vector from origin to a point
Vector between any two points
B−AB - AB−A
Vector with magnitude of 1 unit
Divide a\mathbf{a}a by its magnitude
Changes the magnitude
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