If r = 8 inches then C = 50.27 inches.
It is a line, which is 11 inches long, from the circumference of a circle to its centre.
Diameter = 6 inches Radius = 3 inches Circumference = 2 x pi x radius = 18.84955592 inches
Circumference of circle: 31.4 inchesArea of circle: 78.5 square inches
Assuming a spoke represents the radius of the circle, each one would be 4.29 inches long. When given the circumference (27 inches), the radius (spokes) is calculated using the formula r = C / 2(pi); or Radius = 27 inches / [2(3.14)].
The radius is: 6.267 cm
It is a line, which is 11 inches long, from the circumference of a circle to its centre.
Diameter = 6 inches Radius = 3 inches Circumference = 2 x pi x radius = 18.84955592 inches
Circumference of circle: 31.4 inchesArea of circle: 78.5 square inches
360/30*2 = 24 = circumference of the circle 24/2*pi = 3.819718634 inches = radius of the circle
Assuming a spoke represents the radius of the circle, each one would be 4.29 inches long. When given the circumference (27 inches), the radius (spokes) is calculated using the formula r = C / 2(pi); or Radius = 27 inches / [2(3.14)].
Circumference of a circle = 2*pi*radius or pi*diameter
The radius is 3.82 cm
The radius is: 6.267 cm
By a 21-inch circle I presume you mean that the diameter is 21 inches. So the radius is half as long, 10.5 inches. The formula for the circumference of a circle is 2 pi r, where r is the radius. Pi is about 3.14. That is accurate to 2 decimals, or 3 significant digits all together. I use that approximation because the dimension we are given has 2 significant digits. So the circumference is pi times the diameter; we multiply 3.14 by 21 inches and get 65.94. To 2 significant digits, that is 66 inches. If you meant that the radius was 21 inches, then the circumference would be twice as much, or 132 inches.
14 inches.
Circumference of a circle = 2*pi*radius or diameter*pi Its diameter = circumference/pi
radius = 94.2/(2*pi) = 14.99239564 or about 15 yards