Circumference of a circle = 2piradius or pi*diameter
A 20-inch diameter circle contains: 314.16 square inches.
314.159 ft2
855.21 square feet. A circle with a radius 70 would be (pi)(radius squared) = (3.1416) (70) (70) = 15,393.8 square feet. With a 20 degree angle that is 20/360ths of a circle, so multiply your circle area by 20 and divide by 360 = 855.21 square feet.
The circumference of a circle = pi*diameter. 6 feet 3 inches = 6.25 feet, pi*6.25 = 19.63495408 feet or the circumference of the circle is nearly 20 feet.
Circumference of a circle = 2piradius or pi*diameter
If you mean how many feet AROUND the circle, that is the circumference. Multiply the diameter (3 feet) by pi- 3.14. About 9.42 feet
20 feet
314.159 ft2
There are 20 linear feet across the diameter; and 20π ≈ 62.83 linear feet around the circumference.
how many linear feet in a 20 foot diameter
A 20-inch diameter circle contains: 314.16 square inches.
If the circumference of a circle is 20 feet the diameter is: 6.366 feet (circumference divided by pi = diameter).
314.159 ft2
circumference in feet = 20*pi
20
Radius of a circle with 20' circumference = 20'/2pi = 3.18'Area of a circle with 3.18' radius = ((3.18')^2)pi = 31.8 square feet