To find the circumference of a circle, you have to multiply Pi and the Diameter. This means that to work out the answer you multiply Pi by 1.25. This equals 3.92699081, which rounded equals 3.93 (2dp) - the circumference of a circle with a 1.25 diameter.
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The diameter should be 7m.
Divide the circumference by pi.
Diameter. distasnce from center to edge is radius length around is circumfrance
A diameter of 125 feet is equivalent to saying that the distance from one side of a circle (or sphere), through its centre, to the other side is 125 feet.
Here are the three circle equations, in words and equations. Circumfwerence - pi X diameter C = pi d Circumference = two X pi X radius C = 2pi r Area = pi X radius squared A = pi r^(2) NB It is only the radial value that is squared ; NOT 'pi'. NB pi is a constant at 3.141592..., usually approximated to 3.14 or 3.1416.