The nonagon

 THE REGULAR NONAGON

The regular nonagon or 9-gon has 9 lines of equal length arranged around a middle point.

Figure 1:The nonagon

 

25-gon

 The golden ratio and the 25-gon

Regular polygons: nonagon

 Visual geometry: the regular nonagon

Square root 3 in a nonagon

Nonagon: lines of 1, 2 and square root 3 in a nonagon

The square root of 2 and the golden ratio

 

Nonagon and hexagon

 NONAGON

construction of a regular nonagon, 9-gon , 

Heptagon and square root 2

 

Heptagon and square root 2