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Rough diagram:
Step 1: Draw the \(ΔABC\) with the given measurements.
Step 2: Construct the perpendicular bisector of any two sides (\(AC\) and \(BC\)) and let them meet at \(S\) which is the circumcenter.
![3.PNG](https://resources.cdn.yaclass.in/1cb1ae30-7276-40f1-a4b5-2b96aa406698/3w300.png)
Step 3: \(S\) as centre and \(SA = SB = SC\) as radius, draw the circumcircle to passes through \(A\), \(B\) and \(C\). Circumradius \(=\) \(3.9 cm\).