Well it is really easy to answer this question. Firstly we can calculate the complete circles area which comes out to be pi*r^2 so it becomes 16 pi.
And now we can calculate the complete triangles area which comes out to be 1/2 * base * height so 1/2 * 8 * 4 = 16 cm^2.
Now we can subtract both of them and get our final shaded areas region. So 16 pi or 50.24 minus 16 = 34.2
