4 inches The radius of a circle is always half of its diameter (so 8in/2 = 4 in).
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 area of a circle is the number pi (3.14159...) times the square of the radius. The radius is half the diameter. So if the diameter is 8 inches, the radius is 4 inches. Squaring that gives us 4 x 4, or 16 square inches. Multiplying 16 by pi equals an area slightly larger than 50.26 square inches.
If the area of a circle is about 28 square inches the diameter is: about six inches (5.971).
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.
do 80 times 28 and u will get your answer
area of a circle = pi times radius squared = 3.1415... x (half of diameter of 8 inches)2 = 3.1415... x 42 = 3.1415... x 16 = 50.26548... square inches
The area is 2,640 square inches for a 58-inch diameter circle.
the radius is half of a diameter
A cylinder with a diameter of eight inches and a height of five inches has a surface area of 226.2 square inches.
The circumference C of a circle with radius R is C = 2*pi*R pi = 3.1416... R = 18 Using a calculator: C = 113 inches This is the length of track of an HO model train laid out with eight curved sections to form a circle of radius 18 inches, such as around a christmas tree.
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.
That's actually a cylinder.8 inches = 2/3 footThe volume of a cylinder is (pi) (radius)2 (height) = (pi) (5)2 (2/3) = 52.36 cubic feet (rounded)
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.
Draw two diameter lines, then draw a circle inside the circle.
If you mean a cylinder then it is: pi*4*4*0.25 = 12.566 cubic feet to 3 decimal places
65.97344573 to eight decimal places.
The liquid volume is 30,14400. Pi multiplied by radius square multiplied by length should give the answer to all cylinder volume related questions.
This cylinder has a total surface area of ≈ 1,156.11 square inches.
8 pi; taking pi as 3.14 then answer is 25.12