Sides of a Polygon

[nycmathguy]

How is 110 done?

 

[Country Boy]

Solve the equations (1/2)n(n- 3)= (1/2)(n^2- 3n)= 65 and (1/2)n(n- 1)= (1/2)(n^2- 3n)= 80.

Such polygons exist only if n is a positive integer.

 

[nycmathguy]

Solve the equations (1/2)n(n- 3)= (1/2)(n^2- 3n)= 65 and (1/2)n(n- 1)= (1/2)(n^2- 3n)= 80.

Such polygons exist only if n is a positive integer.

I'll get to this on my days off.