The diameter of a hockey puck is three inches (stickshack website). You divide the diameter of three inches by two, and you get a radius of 1.5 inches . KNOWING THE FORMULA FOR AREA AND CIRCUMFERENCE ...

Remember that the third side — which is equal to 3√2 — is the circle's diameter. We're trying to find circumference, which, as stated earlier, is equal to pi times diameter (c = πd).

It is derived simply, by dividing the circumference of a circle by its diameter, or π = C/d, but the result is a never-ending "irrational" number: 3.14159265.

I am Pi, the ratio of the circumference of a circle to its diameter. Picking up the phone here at the Smithsonian, I set out to find out more about Pi and how it is represented in the national ...

If you are using circumference, you will need to make a calculation to determine the tree diameter: Diameter = Circumference divided by 3.14 (pi).

To make a bodhran one needs to start with a piece of wood, usually ash or oak, about a quarter inch thick, 5-6 inches high, and the correct length of the circumference (pi * diameter). A scarf joint ...