Would glucose and fructose be considered structural isomers or geometric isomers?

Definition of isomers is the molecule with the same formula but different structure.

Geometric isomers have similar structural besides a molecule location geometrically, example: cis/trans isomer.

Glucose and fructose have the same molecule formula which was C6H12O 6. In this case, the isomer is different in structural formula.

So the answer is structural isomers