+0  
 
0
52
1
avatar

How many diagonals are there in a decagon (10-sided polygon)?

 Jun 16, 2021
 #1
avatar+121006 
+1

We can  draw 7  diaginals from every  vertex......and  we  need  to  divide  this  by 2  (since  diangonal  AH  =  diagonal  HA , for instance  ) 

 

So....the  formula  for  the number of  diagonals  =     ( n - 3) n  / 2  =   7 * 10  / 2   =   35

 

 

cool cool cool

 Jun 16, 2021

19 Online Users

avatar
avatar