Octagon

A octagon is a polygon with 8 sides and 8 vertices.

Regular Octagon

A regular octagon is a polygon with 8 equal sides and angles.

Angles of the Octagon

The sum of interior angles of an octagon = (8 − 2) · 180° = 1,080°

The value of an interior angle of a regular octagon is: 1,080º : 8 = 135º

The central angle of a regular octagon measures: 360º : 8 = 45º

Diagonals of the Octagon

The number of diagonals in a regular octagon = 8 · (8 − 3) : 2 = 20

Perimeter of a Regular Octagon

Perimeter = 8 · l

Area of a Regular Octagon

Area of a Regular Pentagon Formula






  •