no traiangles formed in a polygon having 15 sides is ?

• total no. of points=15
  no. of points needed to form a triangle=3
  thus total no of traingles formed=15C 3=455.
• 9 years agoHelpfull: Yes(24) No(0)
• 3,4,5,6 total end points
  455 5460 15015 5005 25935
• 9 years agoHelpfull: Yes(1) No(1)
• For 1st triangle 3 sides.
  Now 15-3= 12 remaining sides
  From now only two sides reqiured for formation of triangle.
  so 12/2 = 6 triangles.
  Hence total , 1+6 = 7 triangles
• 9 years agoHelpfull: Yes(1) No(8)
• 25935 is the correct answer.
• 8 years agoHelpfull: Yes(1) No(1)
• n-2 is for no traingle
  13 ans
• 8 years agoHelpfull: Yes(1) No(1)
• From 15 sides we should choose any 3sides (because it is TRIangle) so 15C3=144 triangles can be formed..
• 9 years agoHelpfull: Yes(0) No(2)
• i got d formulae as n(n-4)(n-5)/6 for n>=6 and as of of d answr it should be 275 ryt..!!! wat do u say guys?
  
• 8 years agoHelpfull: Yes(0) No(2)
• 25935
  https://cs.uwaterloo.ca/journals/JIS/sommars/newtriangle.html
• 8 years agoHelpfull: Yes(0) No(0)