NEED ANSWER ASAP WILL GIVE 30 POINTS!!
In △JKL, KN=21 m.



What is the length of KX¯¯¯¯¯¯?

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m

A triangle J K L. Side J L is the base. M, N, and P are the midpoints of sides K L, J L, and J K respectively. Midpoints of each side connect to the opposite vertex. J M is the median of line segment K L. K N is the median of line segment J L. L P is the median of line segment K J. Medians intersect at a point labeled X. Single tick marks are on the line segments J P and P K. Double tick mark are on the line segments K M and M L. Triple tick marks are on the line segments J N and N L.