Final answer:
The midpoint divides a line segment into two equal parts and is equidistant from either end of the line. If k is the midpoint of JL, it means JK and KL are equal in length.
Step-by-step explanation:
In mathematics, the definition of a midpoint is the point that divides a line segment into two equal parts. The midpoint is exactly in the middle of the line, and it is equidistant from either end of the line segment. This point can also serve as a reference known as 'the origin' when it is used as the starting point for measuring other distances along the line.
If k is the midpoint of line segment JL, it means that k is positioned such that JK and KL are of equal length. In other words, if you were to measure from J to k and from k to L, both measurements would be the same. This property is what defines k as the midpoint of the line segment JL.