a 31'' diameter circle has an area of _ sq ft. ???
A = pi * r^2
A = 3.14 * 15.5^2
A = 3.14 * 240.25
A = ? sq. ft.
754.385 is this correct
That's the area in square inches.
1 square inch = 0.00694444444 square feet
754.385 * 0.00694444444 = 5.23878472 square feet
To find the area of a circle, you can use the formula A = πr², where A represents the area and r represents the radius.
Given that the diameter of the circle is 31 inches, you can find the radius by dividing the diameter by 2. So the radius (r) is 31 inches / 2 = 15.5 inches.
To convert the radius from inches to feet, divide it by 12 because there are 12 inches in a foot. So the radius in feet is 15.5 inches / 12 = 1.29 feet (rounded to two decimal places).
Now, substitute the radius into the formula A = πr². The value of π (Pi) is approximately 3.14.
A = 3.14 * (1.29 feet)² = 3.14 * (1.66 square feet) = 5.18 square feet (rounded to two decimal places).
Therefore, the area of a 31'' diameter circle is approximately 5.18 square feet.