The sidewalk tiles leading to the town library are shaped like regular hexagons. Which of the following describes a regular hexagon?
a figure with 6 congruent sides and 6 congruent angles
a figure with 6 sides and angles that are not congruent
a figure with 5 sides and 5 angles that are not congruent
a figure with 5 congruent sides and 5 congruent angles