Diagonals of 8-gon

For students of class 6-8 (age 12 to 14)
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samiul_samin
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Diagonals of 8-gon

Unread post by samiul_samin » 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

aritra barua
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Joined: Sun Dec 11, 2016 2:01 pm

Re: Diagonals of 8-gon

Unread post by aritra barua » Tue Feb 27, 2018 6:12 pm

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

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samiul_samin
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Joined: Sat Dec 09, 2017 1:32 pm

Re: Diagonals of 8-gon

Unread post by samiul_samin » 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
Screenshot_2019-02-19-17-35-04-1.png (43.67 KiB) Viewed 441 times

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