A triangle ABC has sides a, b and c. For that triangle the

A triangle ABC has sides a, b and c. For that triangle the following statements are given: (i) if b^2=a^2-c^2, then sudut B=90 (ii) if c^2=a^2+b^2, then sudut C=90 (iii) if a^2=b^2-c^2 , then sudut B=90 (iv) if b^2=a^2+c^2 , then sudut A=90 Among the above statements, those which are true are .....