Which of the following best completes the proof showing that δWXZ ~ δXYZ? The proportion _________ₛhows the corresponding sides are proportional, so the triangles are similar by the SAS similarity postulate. a) WX/XY = XZ/YZ b) WX/XY = WZ/YZ c) WZ/XY = WX/YZ d) WZ/XY = XZ/YZ