The median means In geometry, a median of a triangle is a line segment joining a vertex to the midpoint of the opposing side. so that means W is the midpoint
meaning WX ad WZ are congruent because w is the middle of XZ
If YW is median of the triangle, then it will cut the triangle in two equal halves, in that situation, base portion of the triangle must be cut into two equal length. i.e., XW = WZ