Answer:
25
Step-by-step explanation:
Segment XY = 10
Segment XZ = 15
Since the lenght of segment WX is said to be congruent to the lenght of segment XY, therefore:
WX = XY = 10
Segment WX + Segment XZ = Segment WZ (segment addition postulate)
[tex] 10 + 15 = WZ [/tex] (substitution)
[tex] 25 = WZ [/tex]
[tex] WZ = 25 [/tex]
Length of segment WX = 25
