Take a specific gravity reading to see if any fermentation has occurred. Take a taste as well. If the specific gravity shows that fermentation has not happened and it still tastes OK, get another vial of yeast, make a starter with it, and pitch that.
One vial of yeast is not sufficient for 10 gallons of 1.080 wort by most calculations. Pitching at 80 degrees (assuming you mean F instead of C) should not have killed the yeast.