By Lysandros Lysandrou
March 14 th is celebrated globally as Pi Day. Of all mathematical constants, Pi is the best known and commonly approximated as 3.14. Thus, Pi Day honors the constant Pi specifically and mathematics generally. Pi is defined as the ratio of a circle’s circumference divided by diameter. The Greek word for circumference is «περειφέρεια» (periphery). For this reason, the first letter «π» of this word « π
