noun
- a polygon with seven sides and seven angles
Usage: geometry
Examples
- The students were asked to draw a heptagon for their geometry homework.
- A regular heptagon has all sides and angles equal.
- The stop sign is an octagon, but a heptagon has one fewer side.
- She calculated the interior angles of the heptagon.
- The garden was designed in the shape of a heptagon.
- Each vertex of the heptagon was marked with a dot.