the number of diagonals in the decagon

• d = n(n - 3)÷ 2. so 35
• 11 years agoHelpfull: Yes(1) No(0)
• the general formula for calculating diagonals of polygon is (nC2-n)
  where n is the no of sides
  so in case of decagon no of sides is n=10
  (10C2-10)=45-10=35 is the no of diagonals in decagon
• 11 years agoHelpfull: Yes(1) No(0)
• No of diagonals in any polygon= n*(n-3)/2
  
  So,ans is 35 diagonals
• 11 years agoHelpfull: Yes(1) No(0)