Three circles of radius 2 cm touch one another externally. These circles are Circumcribed by a circle of radius R cm. Find the value of R.
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a=2rsinA where a is the side of triangle joining centres. r is the radius circumcribing triangle joing centres.
4=2rSIn60
=2rv3/2
r=4/v3
Radius curcumcribing circles then R =2+4/v3
4=2rSIn60
=2rv3/2
r=4/v3
Radius curcumcribing circles then R =2+4/v3
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