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An equilateral triangle of side 9 cm is ...

An equilateral triangle of side `9` cm is inscribed in a circle. Find the radius of the circle.

Text Solution

Verified by Experts

`2rcos30^o=9cm`
`2r*sqrt3/2=9cm`
`sqrt3r=9cm`
`r=9/sqrt3cm`
`r=3sqrt3cm`.
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