Which triangles are similar to triangle A?

Which triangles are similar to triangle A?

State if the triangles in each pair are similar. If so, state how you know they are similar.

If the triangles are similar, state how.

State the similarity.

Name the similar triangles

$$\Delta ABC\ \sim\ \Delta?$$  

Are the triangles similar?

Name the similar triangles

$$\Delta ABC\ \sim\ \Delta?$$  

Are the two triangle similar?

Name the similar triangles

$$\Delta XEF\ \sim\ \Delta?$$  

What are the three ways to prove triangles are similar?