# Approximately Pi Day

14 March is celebrated by some as Pi Day, and 3.14 is approximately pi. However, 22/7 is more accurate, so 22 July might be a better choice.

#MathIsHard

## 10 thoughts on “Approximately Pi Day”

1. It’s already 15 March here, but anyway…

22 / 7 = 3.14[2857] This was known in Greek/Roman times.

Well…

Much better : Two “1”s, Two “3”s, Two “5”s:

355 / 113 = 3.141592[9292]

And old and classy, too, being about 1500 years old (estimated 460 AD), found by the Chinese mathematician Zu Chongzhi.

My memory is quickly fading, but I think my introduction to this was through Martin Gardner’s regular mathematical columns in “Scientific American”. I believe that he noted that 355/113 was enough precision to give the circumference of a circle with a radius from the Earth to the Moon (muchly simplifying elliptical orbits and actual “centres”), to something like one-foot precision, or perhaps even better.

• Yep. 22/7 doesn’t work here, cuz Merica!

• So it’s 1/Pi day. Who doesn’t like pineapple upside down pie? ðŸ™‚

• I air dry.

• 6.2831853 — for the Greater Good!

Why yes, I am an uber-nerd, why do you ask? ðŸ™‚

2. Have a slice of pecan today & a slice of key lime on 22 July …

Or screw fractions and have the whole pie!

3. What’s the only thing better than Pi Day?

2 Pi Day!

I’m planning a lunchtime work potluck on June 28 where participants bring one savory pie (pizza, pot pie) and one sweet pie (pumpkin, pecan) to share.

• Oddly enough, 3 Pi Day is about the same as Pi Day for most purposes.