Just lol, it up and the you will be fine.
The two triangles are congruent, so corresponding parts of the two triangles are congruent.
GH is corresponding to DE, so GH=DE=17
I think D too because that one is the only one that makes sense
Unproportional. 60/10=6
90/20=4.5
120/30=4
150/40=3.75