The circumference of such a circle is 97.5 ft.
Measure the circle's radius and square it. Multiply the result by pi. This number is the circle's lineal foot measurement.
A=3.14x5x5=78.5 sq. ft.
It is ft. Lineal is not necessary.
Knowing that the area of a circle is its radius squared times Pi, the area of a 10 ft radius circle is 100*Pi square ft, or about 314 square feet.
Square footage of path = (pi*92)-(pi*72) = 100.531 square ft rounded to 3 dp
The word lineal is redundant and so the abbreviation is "ft"
Area = pi*40002 = 50265482.46 square feet
radius = diameter ÷ 2 area = π × radius² = π × (diameter ÷ 2)² = π × (141 ÷ 2)² = 4970¼ π sq ft ≈ 15614.5 sq ft
The area of a circle is pi*(radius)^2. If the 8 ft is the diameter, the area is pi*(4 ft)^2~=50.27 ft^2 (ft^2 is square feet)
Area 36 ft diameter circle = pi x radius squared = 3.1416 x 18 ft x 18 ft = 1017.87 sq ft
Multiply the two together to convert to area. The answer is 111.76 square feet.
Area = pi x radius squared where pi = 3.1416 radius = diameter/2 = 10 ft area = 3.1416 x 10 x 10 = 314.16 sq ft.