Magnitude
If we have a vector [math]\text{\vec{a}}[/math] and want to know its magnitude, we can use the Pythagorean Theorem.[br]The x- and y- components are the catheti (short sides). [br]Notation: |[math]\text{\vec{a}}[/math]|=[math]\sqrt{x^2+y^2}[/math]
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Information: Magnitude