What measure of Angle A will make triangle ABC similar to triangle FDE?

[geometry 1 part B]

Not sure how to start this or the steps to take after to set it up. I know how to check if polygons are similar by the length of their side, but I am clueless when it comes to degrees of a angle . Help would be greatly appreciated

 

[MarkFL]

Hello, and welcome to FMH!

Which angle in $\triangle ABC$ corresponds to $\angle D$?

 

[Dr.Peterson]

Find the missing angle in △DEF. Then determine which of those angles corresponds to ∠A.