Happy Pi Day, everyone! Have a wonderful holiday. I hope you’ll all get a chance to spend some quality time today working math problems with family and friends.

22/7 is a lousy approximation, good to only two decimals. 355/113 is a pretty darned good approximation, good to six decimals.

And 3 is (of course) even worse! (Yet at least a couple of rules of thumb taught by CFIs rely on it.) Anyway.... 3.1415926535897932384626433832795028841971... I think I got that right. Memorized it that far long ago, never bothered to go farther.

For you computer geeks out there, the ASCII code for π is 227 in decimal! (Hold down <Alt> key, type 227 on numeric keypad, release <Alt> key. Use 0176 for a ° symbol!)

All together, now, for the pi cheer... Tangent cotan cosine sine, Three point one four one five nine! Yeeeea, pi!

Seems to be, but can we really be sure that it's not slowly changing in the 1,000,000,000,000,000th decimal place?