Final answer:
A regular heptagon has 7 lines of symmetry.
Step-by-step explanation:
A regular heptagon has 7 sides, and a line of symmetry is a line that divides a shape into two congruent halves. In general, an n-sided regular polygon has n lines of symmetry.
For a regular heptagon, since it has 7 sides, it will have 7 lines of symmetry. Each line of symmetry can be drawn from one vertex, passing through the center, and extending to the opposite side of the heptagon.
So, a regular heptagon has 7 lines of symmetry.