the circumfrence of a circle is pi times it's radius squared.
Diameter = 2 x (radius)Circumference = (pi) x (diameter) = (pi) x (2 x 72) = 144 pi = 452.39-ft (rounded)
The radius of a circle is the distance from the center of the circle to any point on its circumference. In this case, if the circle has a diameter of 20 feet, the radius would be half of that, which is 10 feet. So, the radius of a 20 ft circle is 10 feet.
That depends on what you mean by a "20 ft semicircle".A semi-circle is a half circle.A 20 ft circle could be:A circle of diameter 20 ftThe perimeter of the semicircle is half the circumference plus the diameter → perimeter = 1/2π 20 ft + 20 ft= 10π + 20 ft≈ 51.42 ftA circle of radius 20 ftThe perimeter of the semicircle is half the circumference plus double the radius → perimeter = 1/2 2π 20 ft + 2 x 20 ft= 20π + 40 ft≈ 102.08 ftA circle of circumference 20 ftThe perimeter of the semicircle is half the circumference plus the diameter → perimeter = 1/2 20 ft + 20 ft ÷ π= 10 ft + 20/π ft≈ 16.37 ftHowever, if a 20 ft circle is a circle with a circumference (= perimeter) of 20 ft then a 20 ft semi-circle could be a semicircle with a perimeter of 20 ft→ perimeter = 20 ft
The circumference of an 8 ft circle is: 25.1 feet.
The circumference of a circle when the radius is 25 feet equals about 157.08 feet.
Radius of a circle = circumference/2*pi
157 ft
The circumference is 50π ft or 157.08 ft.
The circumference of a circle with a radius of 4 ft is: 25.13 feet (r x 2 x Pi = circumference).
Circumference of a circle = 2*pi*radius or diameter*pi so in this case circumference = 2 x 3.142 x 1.5 ft = 9.42 ft
A circle with a radius of 14 feet has a circumference of 87.96 feet.
The circumference of a circle that has a radius of 12 feet is about 75.4 feet.
A circle with a radius of 5.5 feet has a circumference of 34.56 feet.
about 6.28
20,410ft
The radius is 30.56 feet.