**Happy ∏**** Day**. March 14th. 3.14. That is ‘p-i,’ not ‘p-I-e’. Pi is an irrational number; it is a non-repeating, non terminating decimal that is used when solving geometry problems dealing with circles. It is pattern-less. Pi is the ratio of the diameter of a circle to the circumference of the same circle.

This is not my normal blog. I usually write about my kids, life in general and various other topics. Today, my inner nerd comes out. I am a middle school math teacher and everyone knows that in some form or fashion, almost all teachers are nerds of some sort. Math nerds are a special group, misunderstood by most of mankind.

PI. Even though pie is how we mathematicians normally celebrate our special day, we allow others to indulge along with us. Normally, it is with chocolate pies, but any type of pie will do. Pizza pies will work, but only if they are round (not square) and the slices are cut through the center-point going the entire diameter of the pie. Each slice should have edges that are the length of the radius.

In ancient days, a few years before I was born, it was believed that the circumference of a circle was about three times of the diameter, or a 3:1 ratio. In the Bible, pi is referenced in 1 Kings, “And he made a molten sea, ten cubits from one brim to the other: it was round all about, and his height was five cubits: and a line of thirty cubits did encompass it about.”

Other cultures have used different values to represent pi. Archimedes of Syracuse, one of the most brilliant mathematicians of the ancient world discovered that pi was approximated by using a 96- sided hexagon. Many formulas have been used to represent pi, but it wasn’t until the 1700’s that a British mathematician named William Jones defined pi as

Π = 3.14159.

This was adopted by Euler and became the standard. Recently, pi was calculated to over one trillion digits.

Enough of that. I may be a math nerd, but it usually doesn’t last very long. Normally, we celebrate each year by having the students compete by reciting the most decimal places for pi. I believe that in the past nineteen years most students were able to memorize twenty to thirty digits. Only a few have exceeded 100 digits. I have had only one to go way beyond that – 240 digits. After that, no one wanted to compete. In order to compete students had to memorize at least 10 digits. If no one in the class could recite 10 digits, I got to eat pie. I only got to eat chocolate pie once in nineteen years. Tasted pretty good and of course it was homemade. This year there will be no competition in my classes. Currently, I teach sixth grade. We don’t hit circles until next year.

So, in the grand scheme of things, what does this all mean? You can use any reason to eat pie, even math.

***John E. Stack is the author of *Cody’s Almost Trip to the Zoo, Cody’s Rescue Adventure at the Zoo, and Olivia’s Sweet Adventure*.

Always nice to meet a fellow math nerd. One of my happiest circle memories is of helping kids in my son’s fourth year (third grade) class (in England) wrap string around multiple circular objects as we waited for that inevitable question … “Miss, is it always three? ” We didn’t celebrate pi day though. That would have been fun.

I always liked math, although I wasn’t a whiz at it. In college, I sat next to a kid who WAS a whiz, but couldn’t grasp history for beans. Whenever we had classes together, he always said “Sit close! Write big!” And so we did in all of the classes we shared. He got me through math. I got him through history. Thanks for a great post, John.

Fun post, John! It’s strange, I was good in high school math, but somewhere along the way, I’ve forgotten much of what I learned. I guess my lifestyle did not require I use it often.Your post was a nice reminder.

Thanks for the comments and the likes. Math has always been my strong suite, even though I enjoyed science a lot more. Maybe it was the teachers. Anyway, it served me well and helped place me in an engineering position in the military, and again as a middle school math teacher. Remember that we all use math every day even if it is to count to 3, or 10, in order to get our kids to do something.

Hi John… I am not a math nerd. 😀

However, I have been looking for a math nerd.

…and…

You said you were a math nerd….

… your post/topic has my attention this year.

Re: PI – an irrational number (could that be… wrong?)

I am of the understanding, if you figure PI, in Base 12 math, it becomes a Rational number, just as it should be, for such an important number that it is.

I am looking for someone, John, kind enough, to do the calculations for me and let me know, if what I say,

is truth.

Perhaps you can help me?

Thanx for considering it,

ren

Nice thought. Don’t know. In base 10 pi is irrational. It has been over 40 years since I worked with base 12. Maybe another math nerd would know about that. Now days my bursts of nerd don’t last long. Good luck.

thanx for your response, John. I will keep searching. 😀 ren

If I find something I will let you know.

Thank you 😀 Enjoy your weekend

Found some free time. Checked Wikipedia (consider source) on duodecimal irrational numbers and it had pi listed as approximation 3.875, but still as irrational. If you find something different let me know. You got my nerd going again.