----------------------------------------------- Radius of the whole circle : ----------------------------------------------- Radius of the whole circle = (4÷2) + 2 Radius of the whole circle = 4
----------------------------------------------- Area of the whole circle : ----------------------------------------------- Area of the whole circle = πr² Area of the whole circle= π(4)² Area of the whole circle= 16π cm²
----------------------------------------------- Radius of the inner unshaded circle : ----------------------------------------------- Radius of the inner unshaded circle = 4 ÷ 2 Radius of the inner unshaded circle= 2
----------------------------------------------- Area of the inner unshaded circle : ----------------------------------------------- Area of the inner unshaded circle = πr² Area of the inner unshaded circle= π(2)² Area of the inner unshaded circle = 4π m²
----------------------------------------------- Area of the shaded region : ----------------------------------------------- Area of the shaded region = 16π - 4π Area of the shaded region = = 12π or 37.70 m² (nearest hundredth)