I am not sure how to solve this problem
49(pi) - (1/2)(7)(7) -(1/2)(6)(6)
The radius CANNOT be 7 units !!!
r = [sqrt( 132 + 12 )] / 2 = 6.519202405 units
The area of the shaded region:> A = ( r2pi ) - (72 + 62) / 2 = 91.0176878 u2