jednak

1. equal; identical
   Svi građani imaju jednaka prava. — All citizens have equal rights.
   Podelili smo novac na tri jednaka dela. — We split the money into three equal parts.
2. (of a person, behaviour) the same; unchanging
   On je prema svima uvek jednak. — He is always the same with everyone.

The thing compared to is in the dative: jednak čemu (equal to something).