Consider the two triangles. how can the triangles be proven similar by the sas similarity theorem? show that the ratios xy/vu and yz/vw are equivalent, and ∠u ≅ ∠x. show that the ratios uv/xy and wv/zy are equivalent, and ∠v ≅ ∠y. show that the ratios uw/zx and xy/wv are equivalent, and ∠w ≅ ∠x. show that the ratios xz/wu and zy/wv are equivalent, and ∠u ≅ ∠z.