Answer :
Between every pair of distinct points, there is a positive unique number called the distance (line, distance, axiom).which can be determined as the absolute value of the difference (sum, difference, absolute value of the difference) of the corresponding real numbers of the two points.
The region between two points is called the distance between those two distinct points.
We can calculate that distance between two points as the difference between the two distinct points.
Line is infinite, hence it cannot be considered as the number between two points and axiom is a rule, hence it cannot come as the answer of the first blank.
For the second blank, we know that the distance between two points cannot be calculated by taking their sum, also difference can be negative, but in absolute difference, we take only the magnitude of the number, hence it will be the answer.
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