BdMO Online Forum

Posted: **Sat Feb 24, 2018 12:19 am**

This is a $8$-gon

Screenshot_2018-02-23-19-50-51-1.png

Count the number of the diagonals of a $8$-gon.

Screenshot_2018-02-23-19-52-20-1.png

Posted: **Tue Feb 27, 2018 6:12 pm**

The answer is $\frac{8(8-3)}{2}$=$20$.

Posted: **Tue Feb 19, 2019 5:36 pm**

samiul_samin wrote: ↑
Sat Feb 24, 2018 12:19 am
This is a $8$-gon
Screenshot_2018-02-23-19-50-51-1.png

Count the number of the diagonals of a $8$-gon.
Screenshot_2018-02-23-19-52-20-1.png

Screenshot_2019-02-19-17-35-04-1.png

BdMO Online Forum

Diagonals of 8-gon

Diagonals of 8-gon

Re: Diagonals of 8-gon

Re: Diagonals of 8-gon