The bricks used to make the walkway leading to the town hall are shaped like regular pentagons. Which of the following describes a regular pentagon?
A. a figure with 5 sides and 5 angles that are not congruent
B. a figure with 5 congruent sides and 5 congruent angles
C. a figure with 6 congruent sides and 6 congruent angles
D. a figure with 6 sides that are not congruent