To get the circumference, multiply the radius by 2π. Then the circumference can be found by multiplying 3 centimeters (1.2 inches) by 2 inches. 3cm (1.2in) x 2in = 18.84cm (7.4in).
Let h be the height of the cylinder and r be the radius of the circle above / below. If you cut the cylinder on one side and spread it out, you will get a rectangle. The side length is h and the width 2pi * r (the circumference of a circle). Therefore, the circumference of a cylinder is 2pi * r + 2h.
The reason we look at the volume formula is that we can manipulate this formula to derive a formula for the height of a cylinder. Where V is the volume of the cylinder and r is the radius of the circular base of the cylinder, the height of a cylinder equals the volume of the cylinder divided by πr2.
You can use the circle circumference formula (c) to find the radius. You will then find the diameter of the cylinder by multiplying it by the height (h) which will give you the volume. If you just want to join the circumference and height of a cylinder, the formula is.
Area is measured in square units such as square meters, square meters, or square meters. To find the area of a rectangle, multiply the length by the width. The formula is: A = L * W where A is the area, L is the length, W is the width and * means multiplication.
Circumference = π x diameter of the circle (Pi multiplied by the diameter of the circle). Just divide the circumference and you will get the length of the diameter. The diameter is only twice the radius, so divide the diameter by two and you get the radius of the circle!
Perimeter, area and volume
The edge of the rectangle = 2 (l + b). Perimeter and area of the square: Area of the square = S × S.
Let r be the radius of the sphere, so volume = r3 cubic units. Area = (4 r2) m²
What to Remember
The volume of a sphere by its circumference is simple.
The circumference of a circle or sphere is 6.2832 times its radius. The circumference of a circle or sphere is 3.1416 times its diameter.
To find the area of a sphere, use the equation 4πr2, where r is the radius you want to multiply by itself to make it square. Then multiply the square radius by 4. For example, if the radius is 5, it’s 25 times 4, which is 100.