A distinct pair refers to a unique combination of two elements or items where the order does not matter, and the elements are different from one another. For example, in the set {A, B, C}, the distinct pairs would be (A, B), (A, C), and (B, C). Each pair is considered distinct because it consists of different elements and is not repeated in any form.
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Pair of radii
It's more likely you mean factor pair. Since 2 x 3 = 6, (2,3) is a factor pair of 6.
If no pair of lines is parallel and if each pairwise intersection is distinct, there will be 10 points of intersection.
If no pair of lines is parallel and if each pairwise intersection is distinct, there will be 6 points of intersection.
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.