An equilateral triangle has perimeter a cm . find its area

• Perimeter of the triangle is 3a where a is it's side
  area=Sqrt(3)/4 a^2
• 12 years agoHelpfull: Yes(4) No(7)
• 2a/12root3
• 9 years agoHelpfull: Yes(3) No(1)
• perimeter=a
  each side= a/3
  area= Sqrt(3)/4*(a/3)^2
  area=a*sqrt(3)/36
• 7 years agoHelpfull: Yes(1) No(0)
• perimeter = a cm
  perimeter of equilateral triangle = 3x
  hence equating both
  3x=a
  x=a/3
  area formula = (sq root of 3)/4*x^2
  sub x in above
  Area = a^2(sq root 3)/12
• 6 years agoHelpfull: Yes(1) No(0)
• a^2/18
  Where base and height are same which is a/3 and area is given by 0.5bh, where b and h are base and height.
• 4 years agoHelpfull: Yes(0) No(1)