Answer:
Area of the blue border is 100.544 ft²
Step-by-step explanation:
What is the area of the blue border?
Area of a Circle = πr² , where π = 3.142
Where: Outer diameter = 12 ft ==> (half of diameter) Radius (r₁) = 6 ft
Inner diameter = 4 ft ==> (half of diameter) Radius (r₂) = 2 ft
The blue border is the space between the edge of the rug and the inner red circle.
The area of the blue border = Area of outer circle - Area of the inner circle
Area of Outer Circle = πr₁² = 3.142(6)² = 113.112 ft²
Area of Inner Circle = πr₂² = 3.142(2)² = 12.568 ft²
The area of the blue border = 113.112 - 12.568
= 100.544 ft²
