Choose the most appropriate word that can substitute the given group of words. A polygon with eight sides and eight angles.

Triangle Hexagon Octagon Pentagon

Octagon

The most appropriate word that can substitute the given group of words is octagon. Triangle has 3 sides and 3 angles. Hexagon has 6 sides and 6 angles. Pentagon has 5 sides and 5 angles. Octagon has 8 sides and 8 angles.