Because an "octagon" is defined as a closed plane figure with 8 vertices which is bounded by straight lines. It must, therefore, have eight sides.
An octagon has 8 sides and 8 corners.
An octagon has 8 sides.
An octagon has eight sides and eight vertices. An octagon has 8 sides and 8 vertices.
An octagon has 8 sides and a pentagon has 5 sides.
A polygon with 8 sides is an octagon.
An Octagon has 8 sides.
8 sides Octagon 6 sides hexagon
An octagon has 8 sides
An octagon has 8 vertices and 8 sides
A octagon has 8 sides.
It has 8 sides.
An Octagon has 8 sides. The other more popular shapes are Hexagon which has 6 sides, a Pentagon which has 5 sides, a Square which has 4 sides and a Triangle which has 3 sides.