PLZ HELP ME!!

Circle D has diameter EF. The measure of ∠GDF = 55° What is the measure of EH?
https://learning.k12.com/d2l/common/viewFile.d2lfile/Database/MTMwNzI4NjM/TOD_3.05.JPG?ou=373243
(I hope the image works if not plz tell me!!)


305°

180°

125°

55°