Wrap the string around the cylinder, mark where the end of the string touched itself, remove the string, and measure from the end of the string to the mark.
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Length, radius ,diameter, circumference
Ah, what a lovely question! To find the circumference of a cylinder, you'll want to use the formula 2πr, where r is the radius of the cylinder. Since the diameter is 16 inches, the radius would be half of that, which is 8 inches. So, the circumference would be 2 x π x 8, which is approximately 50.24 inches. Keep painting with those happy little numbers!
The surface area of a cylinder can be derived from the area of rectangle. If you 'unroll' a cylinder you have a shape of a rectangle, similar to a sheet of paper. The width of the rectangle will be the height of the cylinder and the length of the rectangle will be the circumference of the cylinder end.So, Area = length * widthwhere, width = height of cylinder & length = circumference of cylinder end = PI*(Diameter of cylinder)Therefore,surface area of a cylinder = (PI)*(diameter of cylinder)*(height of cylinder)Hope that helps!
divide the circumference by pi (3.1416) and divide the product by two that will give you the radius
The circumference of any circle is the distance around the outside. You can take a piece of string and measure the outside of the quarter. See how much string fits around the outside. Then put that length of string up against the edge of a ruler and see how long it is.