Based on the side lengths alone, could the triangles be similar? 16.0 cm R 6.4 cm 3.0 cm 15.0 cm S T 6.0 cm X 7.5 cm U No, the side are not proportional. Yes, the sides are in the ratio 2:5. yes, the sides are in the ratio 4:5. Yes, the sides are in the ratio 1:5.