# Hi! I have a doubt on heptagons,octagon, nonagon& decagon. How many diagonals do they have? How to draw them?

We can use formula to find number of distinct diagonals .

Number of diagonals  of n - sided polygon  =

So,

Number of diagonals of heptagon (  We know in heptagon we have 7 sides , So n  =   7 )   =    =  14
And

Number of diagonals of octagon (  We know in octagon we have 8 sides , So n  =  8 )   =    =  20
And

Number of diagonals of nonagon (  We know in nonagon we have 9 sides , So n  = 9 )   =    =  27
And

Number of diagonals of decagon (  We know in decagon we have 10 sides , So n  =  10 )   =    =  35
And

We can draw these diagonals by joining each non consecutive vertices.

Here we have draw diagonals of heptagon , As :

You can try to draw diagonals  for different polygon by yourself and if still have any doubt , Kindly get back to us so we can help you precisely  .

• -1
What are you looking for?