In triangle ABC, AB=9, BC=12, and CA=6. In triangle DEF, DE=16, EF=8, and FD=12. Are the triangles similar?

Question

Are the triangles similar by SSS, or not similar? 

Answer 1

AC/EF = AB/DF = BC/DE

6/8 = 9/12 = 12/16

3/4 = 3/4 = 3/4

Since corresponding sides are proportional, the triangles are similar.