Suppose v is in R^2 say v = [a ]. If we identity v with a [b]a geometric point in the plane, as usual then ||v|| coincides with the standard notion of __________________________.

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1. Suppose v is in R^2 say v = [a ]. If we identity v with a
[b]
a geometric point in the plane, as usual then ||v|| coincides with the standard notion of __________________________.