The circumference is easy to calculate: diameter x Pi (about 3.1416) = circumference. So,
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Circumference of a circle = 2*pi*radius or diameter*pi Its diameter = circumference/pi
The circle's diameter is about 3.97887358 units long.
A circumference of 21.99 cm
Just multiply the diameter times pi. Pi is approximately 3.1416. ____________________ Circumference = pi * diameter. Pi is an "irrational" number (cannot be expressed as a fraction) whose length is infinitely long, but 3.1415 is generally close enough for practical purposes. So, 18 * 3.1415 = 56.547 feet.
Circumference of a 25 feet circle = pie x diameter x 12 942.477 inch 1 feet = 12 inch so i converted into inch as i am having the other component in inch No of 12 inch long blocks = circumference /12 so total 78 pieces will be required to make a circle of dia 25 feet