Pi Post!

This last pi day (March 14, or 3.14) was special. The date was 3.14.15, all in keeping with pi (3.14159265359….) Being a very naive non-mathematition sort of person, the following occurred to me. I await a response from a left side brain dominant person.

We can never know how big any circle is:

The circumference, c, of a circle is 2πr, where r is the circle’s radius and π is “pi,” mentioned above. Since r is half the diameter of a circle, we can write c=πd, where d is the diameter.  π is an irrational number; it’s a tiny bit more than 3.1415, but no one knows exactly what its value is. How can this be, since we can measure d, as well as c, exactly? In other words, how can we get an exact number for c by multiplying d by an inexact number?

I baked a sweet potato pie, pictured below, without realizing that its circumference could never be known. Luckily, I had a very ambiguous pie pan. Please click the slice of pie to travel to another Daisybrain post of my choice:


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