#### rightbraincreative

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- Thread starter rightbraincreative
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The circumference of a circle is \(\displaystyle \pi\cdot D\). A good approximation is "three times around as it is across"

\(\displaystyle \pi\approx 3.1415\).

As \(\displaystyle \pi \ \) = 3.141592..., the rounded value of \(\displaystyle \ \pi \ \ = \ \ 3.1416 \ \ \) to four decimal places.The circumference of a circle is \(\displaystyle \pi\cdot D\). A good approximation is "three times around as it is across"

\(\displaystyle \pi\approx 3.1415\).

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So, without getting into too many decimal points, my 4 foot diameter circle can be created by multiplying pi times the diameter I need. 3.14 x 4= 12.56. My pipe needs to be roughly 12 and a half feet to make a four foot hoop. Thank you all for your expertise. This will help me finish an art project I am working on. I knew pi was involved in the equation, but not how. I guess I should have paid more attention in math classes and less attention to art. But, in the end, art is what pays my bills each month.The circumference of a circle is \(\displaystyle \pi\cdot D\). A good approximation is "three times around as it is across"

\(\displaystyle \pi\approx 3.1415\).

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Thank you for the additional thoughts. Yes, these are conditions I need to factor in to my design.innerdiameter of the physical object, then allowances must be made for stretching of the material, along with the depth of the material (diameter of the pipe, perhaps?), with the computations adjusted to account for the fact that a pipe cut to form the desired circle on theinneredge may have a gap on the outer edge. And crushing or crumpling may reduce the expected inner measure, after bending, as well.