Area of a circle = pi R2 = 16 pi = 50.265 square miles (rounded)
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Area of a circle = pi R2 = 9 pi = 28.27 square miles (rounded)
The formula for the area of a circle is: 3.14 (pi) times the radius squared. A circle with a 40 mile radius would have an area of 3.14 x 40 x 40 = 5024 square miles.
To calculate the area of a circle with a radius of 5 miles, you would use the formula A = πr^2, where A is the area and r is the radius. In this case, the area would be A = π(5)^2 = 25π square miles. Since π is approximately 3.14, the area would be approximately 78.5 square miles within a 5-mile radius.
For a circle with a radius of 4 miles, the area is about 50.26 square miles. A = pi r2 A = 3.1416 x (4)2 = 3.1416 x 16 = approximately 50.2656 sq. mi.