The measure of central angle qrs is 8 pie 9 radians what is the area of the shaded sector

The picture in the attached figurewe know thatarea of the circle=pi*r²for r=18 unitsarea=pi*18²> area=1017.36 units²if 2*pi radians  (full circle) has an area > 1017.36 units²8*pi/9 > xx=(8*pi/9)*1017.36/(2*> x=452.16 units²alternative methodarea of a sector=(∅/2)*r²> when  ∅ is in radiansarea of a sector=((8*pi/9)/2)*18²> (144)*pi units²> 452.16 units  ²the answer is452.16 units²