yep pair means 2 because a pair is like a pair of shoes and theres 2 shoes so yeah
However, there are exceptions, such as a "pair of jeans" in which there is only one item.
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It's more likely you mean factor pair. Since 2 x 3 = 6, (2,3) is a factor pair of 6.
Geometric mean of 2 and 8 = sqrt(2*8) = sqrt(16) = 4
Each element is the mean of the corresponding elements. Thus, the mean of (x1, y1) and ( x2, y2) is [( x1 + x2)/2, (y1 + y2)/2]
It is sqrt(8) = 2.8284, approx.
A pair has 2 in it. EXAMPLES= a pair of shoes a pair of paints (not a pear the fruit)