Answer:
YX < YW < XW
Step-by-step explanation:
12v +(v+57) + (v+39) = 180
14v + 96 = 180
14v = 84
v = 6
3 angles from smallest to largest: 72° (12v) (XW) , 63° (v+57)(YW) , 45° (YX)
side length: YX < YW < XW
