There is a circle which circumscribes three unit circles which are tangential to each other. What is the circumference of the bigger circle?

• join the centers of the three circles.We get an equilateral triangle of side 2 cm.No radius of the bigger circle is = circum-radius of this triangle+ radius of the smaller circle.
  Circum-radius of the traingle=(side/root(3))=2/square root(3)
  radius of the bigger circle=1+2/square root(3)
  circumference=2*pi*(1+2/square root(3))
• 9 years agoHelpfull: Yes(7) No(0)
• answer=pie(2 root 3+4)/under root 3
• 9 years agoHelpfull: Yes(4) No(0)
• ans=pie/2-1
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• radius of bigger circle will be 3
  so circumference is 6*pie
• 9 years agoHelpfull: Yes(1) No(2)
• radius of bigger circle is 2 unit
  so circumference=4*pie
• 9 years agoHelpfull: Yes(0) No(1)