W, X, Y, ZWXYZ if W, X, equals, 41WX=41, X, Y, equals, 39XY=39, Y, Z, equals, 27YZ=27, Z, W, equals, 37ZW=37, and start overline, W, X, end overline, \parallel, start overline, Y, Z, end overline
WX
∥
YZ