Pi is the ratio of a circle’s circumference to its diameter and this knowledge is widely used throughout mathematics. Pi is represented often by a Greek letter , which vaguely resembles a small tab with one really curved leg. That’s the symbol in the middle.
In honor of Pi Day, so designated by the U. S. House of Representatives in 2009, I would like to share the following sentiment:
“Pi r squared? No, pi are round, cake are square!”
Said by one very disappointed farmer father to his college graduate son, who was showing off his new learning. Maybe the value of learning is in your perspective.
Finally, I would like to observe that Pi is a very, very long number:
Thinking more about apple pie than mathematical pi in the Heartland ….
All images from Wikipedia