Answer :
You would need to use the Law of Cosines.
c^2=a^2+b^2-2abcosC
In this case:
c=√(32^2+35^2-2*32*35cos120)
c≈58.04 units
c^2=a^2+b^2-2abcosC
In this case:
c=√(32^2+35^2-2*32*35cos120)
c≈58.04 units