In the figure, the area of the shaded part is 37.7 square units
How to find the area of the shaded part
Area of the shaded portion is solved as using the formula
area of bigger circle - area of smaller circle
area of bigger circle
= π R²
where R is radius
From the figure radius of the bigger circle is equal to diameter of the smaller circle.. So R = 4 and r = 2
area of bigger circle
= π 4²
= 16π
area of smaller circle
= π 2²
= 4π
Area of shaded part
= 16π - 4π
= 12π
= 37.7 square units