31x3.1416=circumference
65.94
To be exact, it is 11/π. For a rough numerical representation of it, it is about 3.50140875.
Circumference of the circle: 7.4*pi cm
The circumference is 62.8318531 inches.
150.8
Exact area of the circle: 9*pi inches
-- Exact circumference = 2pi meters -- Approximate circumference = 6.283 meters
Approx. circumference = multiply diameter by 22 and divide the product by 7. Exact circumference = Pi x diameter.
The circumference of any circle when divided by its diameter has the exact value of pi
Exact area of the circle: 9*pi inches
1075.210086