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The radius of the circumcircle of an equilateral triangle having a length of each side equal to ‘a’ is : 
  • a)
    √3a
  • b)
    2a/
  • c)
    √3a/2
  • d)
    a/√3
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
The radius of the circumcircle of an equilateral triangle having a len...
For an equilateral triangle ABC, O lies on the perpendicular from any vertex to the opposite side.

Also, 
AO : OD = 2 : 1 (for equilateral triangle)

(using componendo-dividendo) 
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