A '''line segment''' is a finite, unbroken portion of a [[line]] (lines extend infinitely in both directions). For example, the [[real line]] extends through all the real numbers from negative [[infinity]] to positive [[infinity]]. A line segment of the real line is more commonly known as an [[interval]], ''[a,b]'' for some real numbers ''a≤b''. | A '''line segment''' is a finite, unbroken portion of a [[line]] (lines extend infinitely in both directions). For example, the [[real line]] extends through all the real numbers from negative [[infinity]] to positive [[infinity]]. A line segment of the real line is more commonly known as an [[interval]], ''[a,b]'' for some real numbers ''a≤b''. |