Visual geometry
23-gon
THE REGULAR NONAGON
The regular nonagon or 9-gon has 9 lines of equal length arranged around a middle point.
Figure 1:The nonagon
The golden ratio and the 25-gon
Visual geometry: the regular nonagon
Odd numbers times three, 3x , x=odd number, 9,15,21,27,111
An interesting right angle triangle with sides: 1/2√5 , 1/2√3 and the hypotenuse √2
NONAGON