What is the Ruler Postulate?
Answer – According to the ruler postulate:
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Every point on a line can be equated to a real number; the real number representing the point is called its coordinate.
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The distance between any two points on the line equals the absolute value of the difference of their coordinates.
Explanation:
The ruler postulate is especially useful while trying to find the lengths of line segments.
For example, consider two points and .
The distance between A and B, given by .
Even if AB is found using , the answer would be the same.
Length is always positive. Hence, it is always equal to the absolute value.
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