It is known that in RT △ ABC, ∠ BAC = 90 °, ab = 5cm, AC = 6cm, and the height ad on the edge of BC = 4cm. What is the radius of the circumscribed circle of △ ABC

It is known that in RT △ ABC, ∠ BAC = 90 °, ab = 5cm, AC = 6cm, and the height ad on the edge of BC = 4cm. What is the radius of the circumscribed circle of △ ABC

3.25cm