you are given 87 matchsticks .they are arranged in regular manner.Find the no of a)triangle formed
b)rectangle formed

• triangles=29
  rectangles=21
• 11 years agoHelpfull: Yes(11) No(12)
• no of triangles formed= (n-1)/2 =87-1/2=43.
  no of rectangles formed=half no of triangles=43/2=21
• 11 years agoHelpfull: Yes(7) No(5)
• triangles= 87/3=29
  rectangles =87/4 =~21
  I hope so...
• 11 years agoHelpfull: Yes(4) No(1)
• triangles=43
  rectangles=28
• 11 years agoHelpfull: Yes(2) No(1)