Vectors first created 26/09/05 - last modified xx/xx/xx Page Author: Ty Harness
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Figure 1 - Vector magnitude
From the above figure the hypotenuse of the triangle in the XY plane is $sqrt(x^2 + y^2)$ (Pythagorean Theorem) and the triangle out of plane where l is the hypotenuse $l^2 = (sqrt(x^2 + y^2))^2 + z^2 = x^2 + y^2 + z^2$ and hence $l= sqrt(x^2+y^2+z^2)$

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