va rog foarte mult ajutatima!!! Pls =)

1.
180° - 121° = 59°
2.
∡B = 180° - (65 + 40) = 75°
∡C < ∡A < ∡B
AB < BC < AC
3.
=> (L.U.L) => ΔABC ≡ ΔDEF
4.
52°47' + 39°25' = 91°72' = 92°12
84° - 45°25' = 83°60' - 45°25' = 38°35'