Octagons have 8 sides

 

In the word of computers, a byte is 8 bits.

 

In Science, 8 is the atomic number for Oxygen

 

When a number 8 lie down, is infinity (∞)

 

9×9+7=88

98 x 9 + 6 = 888

987 x 9 + 5 = 8888

9876 x 9 + 4 = 88888

98765 x 9 + 3 = 888888

987654 x 9 + 2 = 8888888

9876543 x 9 + 1 = 88888888

98765432 x 9 + 0 = 888888888

 

An Octahedron have eight equal sides that is formed by 8 triangles