The Semitic form probably had no meaning. The Greek form is used for the circumference of a circle with unit diameter. Why a version of this letter with the right upright rounded became the Roman "P", matching the Greek letter for "R", is anybody's guess.
"Π" Letter in mathematics and...
is about the number π. For the Greek letter, see Pi (letter). For other uses of pi, π, and Π, see Pi (disambiguation). The number π is a mathematical
article is about the Byzantine Emperor. For other uses, see Justinian (disambiguation). Justinian I (/dʒʌˈstɪniən/; Latin: Flavius Petrus Sabbatius Iustinianus
Charilaos Trikoupis (Greek: Χαρίλαος Τρικούπης) (July 11, 1832 (O.S.) – April 1896) was a Greek politician who served as a Prime Minister of Greece seven
Eastern alphabets, including Latin and Cyrillic. Apart from its use in writing the Greek language, both in its ancient and its modern forms, the Greek alphabet
Rigas Feraios (or Rhegas Pheraeos) or Rigas Velestinlis (or Rhegas Velestinles) (Greek: Ρήγας Βελεστινλής-Φεραίος, pronounced [ˈriɣas vɛlɛstinˈlis fɛˈrɛɔs]