Quick answer
A heptagon is a polygon with 7 sides.
- Main formula
- Regular perimeter = 7 x side; regular area = (perimeter x apothem)/2.
- Quick example
- If each side measures 4, the perimeter is 28.
Definition
A heptagon is a closed polygon formed by 7 line segments.
Regular heptagon
In a regular heptagon, all sides and all interior angles are equal.
Formulas
- Perimeter of a regular heptagon: P = 7s.
- Area of a regular heptagon: A = (P x a)/2, where a is the apothem.
Example
If a regular heptagon has side length 4, then P = 7 x 4 = 28.