Answers

2014-08-20T19:40:27+05:30
Radius of a circumcircle of an equilateral triangle r = s/√3
where s = side of triangle
 r = 4/√3
r = 2.309 ≈ 2.31 cm.
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  • Brainly User
2014-08-20T19:43:34+05:30
Radius of a circumcircle is given by formula S/√3
so 
the radius is 4÷√3
=2.30940
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