A heptagon has seven vertices.
To understand this, we need to break down the term ‘heptagon.’ The prefix ‘hepta-‘ comes from the Greek word for seven. A heptagon is a polygon with seven sides, and each side connects to two corners or vertices. Therefore, if a heptagon has seven sides, it naturally follows that it must also have seven vertices. Each vertex is a point where two sides meet, making it essential to the overall structure of the heptagon.