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Diagonals of decagon
Posted: Tue Feb 19, 2019 5:22 pm
by samiul_samin
How many intersection point will you get if draw all the diagonal of a $10$ gon?
Re: Diagonals of decagon
Posted: Tue Feb 19, 2019 5:29 pm
by samiul_samin
This is BdMO regional 2016 Question.
Hard way
Draw a $10$ gon
Draw all the diagonals and count the intersection points.
You will get $210$ intersection points.
Screenshot_2019-02-19-17-24-30-1.png
This picture is very beautiful to see.
Easy way