Part 1
Remember that
If two triangles are similar , then the ratio of its corresponding sides is proportional and its corresponding angles are congruent
so
Verify the proportion
38.5/14=22/8
38.5*8=14*22
308=308 -----> is true
that means
the triangles are similar
Part 3
Verify the proportion
22/9=30/12=25/10
2.44=2.5=2.5 ------> is not true
that means
the triangles are not similar