Answer:
Both triangles are similar
Step-by-step explanation:
Triangles are similar if their 3 angles are equal each other. First 2 triangles are similiar becuase both triangles have angles 60*,15*, and if the 2 angles are equal then the third is equal too. If triangles are similar then the proportions must be the same. 18/12=9/6 ` the proportion is kept and one angle is equal thus they are similar too.
