A circle is centered at O. The tangent to the circle at P is extended to Q. Line segment QS intersects the circle at R. Given that OS = 2, SR = RQ = 3, and PQ = 6, find the radius of the circle.
By power of a point, the radius is 3*sqrt(2).
https://web2.0calc.com/questions/hello-any-help-is-greatly-appreciated#r6
+107 
