12) m(∡B) =m(∡E) = 38° ; m(∡A) = m(∡D) = 120° ;
m(∡C) = m∡(F) = 180°-(38°+120°) = 180°-158° = 22°
AB = DE = 3 ; AC = DF = 5 ; BC = EF = 7
13) AB = EF ; BC = DF ; AC = DE ( BCIIDF ; A si E simetrice fata de BC si DF) =>
ΔABC ≡ ΔDEF
MN = RS ; RT = NP ; ST = MP ; m(∡M) = m(∡S) = 90° => ΔMNP ≡ΔSRT
XY = UG ; XZ = VG ; YZ = UV ( XZ II VG ) => ΔXYZ ≡ΔGUV
