There are only two geometric isomers of the triamminetrichloroplatinum(IV) ion, [Pt(NH3)2Cl3]+. How many geometric isomers would be

Question:

There are only two geometric isomers of the triamminetrichloroplatinum(IV) ion, [Pt(NH3)2Cl3]+. How many geometric isomers would be expected for this ion if it had a regular planar hexagonal geometry? Give drawings for them. Does this rule out a planar hexagonal geometry for [Pt(NH3)2Cl4]+ ? Explain.