10 Surprising Pi Day Facts.<br />In honor of Pi Day on March 14,<br />here are 10 facts about the <br />essential math constant.<br />1. Because pi is an infinite number,<br />every single digit will never be determined.<br />Pi has currently been calculated<br />to 22,459,257,718,361 digits.<br />2. Pi has it’s own writing style<br />called Pilish. The number of letters in<br />successive word are chosen to match<br />the number sequence found in pi.<br />3. Pi can be hand-calculated fairly easy<br />by creating a circle with a protractor<br />and measuring its diameter with a ruler.<br />4. Pi was discovered by ancient<br />Babylonians nearly 4,000 years ago.<br />5. Physicist Larry Shaw, the "Prince of Pi,"<br />launched the first pi celebration in 1988<br />at a San Francisco science museum.<br />6. Some people believe that tau,<br />which is pi multiplied by two,<br />is a more intuitive irrational number.<br />7. Albert Einstein was born on March 14, 1879<br />and Stephen Hawking died on March 14, 2018.<br />8. The symbol for pi is the Greek<br />letter π . It is the first letter of the<br />Greek words for “periphery”<br />and “perimeter.”.<br />9. Because the exact number of pi can<br />never be calculated, we will never be able<br />to find the exact circumference or area of a circle.<br />10. The record for most digits of pi memorized<br />is held by Rajveer Meena of India. He recited<br />70,000 decimal places of pi in 2015
