how many match sticks are needed to form 87 triangles in series

• 175 match sticks needed.
  3 sticks are needed to form first triangle then additional 2 sticks are needed to create another triangle.To make 87 triangle
  86*2+3=175
• 12 years agoHelpfull: Yes(22) No(1)
• No. of matchsticks used = 2n+1
  Here n = 81 given
  So, no. of matchsticks = 175
• 12 years agoHelpfull: Yes(21) No(3)
• No of matchsticks required = 2*87+1= 175
• 12 years agoHelpfull: Yes(9) No(1)
• 2*87+1=175
  2 sticks for every traingle and one stick extra for first triangle.
  
• 12 years agoHelpfull: Yes(5) No(0)
• only one triangle needs 3 sticks since they are arranged in series and the other triang need just 2 sticks......
  
  that gives us 3+(86*2)=175 sticks needed
• 12 years agoHelpfull: Yes(3) No(0)
• 1st triangle require 3 sticks
  another 86 triangle require 86*2=172 sticks
  total=3+172=175
• 12 years agoHelpfull: Yes(3) No(0)
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• 11 years agoHelpfull: Yes(1) No(0)
• 175 difference between the match sticks of two successive triangles is increasing by 1
• 12 years agoHelpfull: Yes(0) No(0)
• total 75 match sticks is enough...
• 12 years agoHelpfull: Yes(0) No(3)
• 3 sticks form one triangle
  and the remaining takes 2 sticks to form triangle adjecent to first triangle
  so
  (87-1)/2
  =86/2
  =43
• 12 years agoHelpfull: Yes(0) No(2)
• 2n+1 is the formula
  n=87 so 2*87+1=175 is the ans.
• 11 years agoHelpfull: Yes(0) No(0)