Radius is one-half of the diameter of a circle. Therefore, the radius of an eight-inch diameter circle is four inches. The diameter of a circle is a straight line joining a point on the circumference through the centre to the 'opposite' point on the circumference.
The diameter, or the distance across the circle. So if my diameter was 8, I'd take eight times 3.14 and get... give me a minute... 25.12! (That was done using pencil/notecard) Or, you can find the diameter by dividing the Circumference by Pi.
Eight.
The circumference of an 8-inch diameter wheel = d*pi = 8*pi. Each revolution will advance the wheel by one circumference, so 2000 revolutions per minute would be 2000 * 8 * pi = 1600pi feet per minute.
Eight of them.
The circumference is pi times twice the radius, and the diameter is twice the radius, so the circumference is pi times the diameter: 25.13278 feet.
Divide the circumference (38") by Pi (about 3.1416) to get the diameter in inches.
If you divide eight by pi, you get 2.54647909 as the diameter. If you divide eight by 3.14 (simplified pi), you get 2.54777070 as the diameter.
8 pi; taking pi as 3.14 then answer is 25.12
615.752 m2
Radius is one-half of the diameter of a circle. Therefore, the radius of an eight-inch diameter circle is four inches. The diameter of a circle is a straight line joining a point on the circumference through the centre to the 'opposite' point on the circumference.
The diameter, or the distance across the circle. So if my diameter was 8, I'd take eight times 3.14 and get... give me a minute... 25.12! (That was done using pencil/notecard) Or, you can find the diameter by dividing the Circumference by Pi.
Eight.
circumference=2(pi)r so divide the given circumference on 2pi, it will give radius. Now multiply radius by 2 you will get the diameter.
4 inches
If the area of a circle is about 28 square inches the diameter is: about six inches (5.971).
4 inches The radius of a circle is always half of its diameter (so 8in/2 = 4 in).