These panes are insulated and tempered.
Insulated glass is multiple panes with a gap between each (then filled with nitrogen to prevent fogging). Since these are one inch, the individual panes are much thinner. They are useless for anything other than a window.
Tempered glass can not be cut unless it is annealed first. Annealing requires a glass furnace. Your neighborhood glass shop can not anneal glass, but they may trade your tempered glass for plate glass (not tempered).