In geometry, what do you call a seven-sided polygon?

• A. Hexagon
• B. Heptagon
• C. Octagon
• D. Decagon

Answer: (B)

A seven-sided polygon is referred to as a heptagon. The prefix "hepta-" derives from the Greek word for seven, which clearly indicates that this polygon has seven sides and seven angles.

In geometry, polygons are named based on the number of their sides, and each name has a specific prefix associated with that number. For example, "hexagon" is used for a six-sided polygon, while "octagon" refers to an eight-sided polygon. A "decagon" describes a polygon with ten sides. Recognizing these prefixes helps in identifying and understanding the properties of different polygons based on their side counts. Thus, heptagons are distinctly characterized by having seven sides and angles, making the term specific and accurate for a seven-sided figure.