Triangle DEF and triangle DGF are shown in the diagram. To prove that ΔDEF ≅ ΔDGF by SSS, what additional information is needed? ∠DEF ≅ ∠DGF ∠DFE ≅ ∠DFG DE ≅ DG DG ≅ GF (this is just to give some answers away to some people, I felt generous today :) )

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling