We can use the secant-secant product theorem to find PC
AC (AC + PC) = AB (AB + SB)
8 ( 8 + PC) = 5 (5 + 25)
64 + 8PC = 5 (30)
8PC = 150 - 64
8PC = 86
PC = 86/8 = 43/4 =10.75
So AP = 8 + 10.75 = 18.75
So SP^2 = [ AS^2 - AP^2 ] = [ 30^2 - 18.75^2]
Connect SC and we have right triangle SCP....and since APS is a right angle....then SC will be the diameter of the circle
So SC = sqrt [ PC^2 + SP^2 ] = sqrt [ 10.75^2 + 30^2 - 18.75^2 ] = sqrt (664)
So....the radius = sqrt (664) / 2
And the area of the circle is (sqrt (664) / 2 )^2 * pi = (664/4) pi = 166 pi units^2