what is the area of the shaded part of the circle that has a diameter of 8mm use 3.14 for

what is the area of the shaded part of the circle that has a diameter of 8mm use 3.14 for

what is the area of the shaded part of the circle that has a diameter of 8mm use 3.14 for. There are any references about what is the area of the shaded part of the circle that has a diameter of 8mm use 3.14 for in here. you can look below.