pi

Εννοια (Αγγλικός)

Έννοιες

πι

Μεταφράσεις

pi

pika

3.14159265358979323846

بِي

پِي

Συχνότητα

C2
Προφέρεται ως (IPA)
/paɪ/
Ετυμολογία (Αγγλικός)

From Ancient Greek πεῖ (peî), ultimately from Proto-Semitic *pay- (“mouth”). Doublet of pe. Its mathematical use apparently stems from its use as the first letter in περιφέρεια (periphéreia, “periphery; circumference”) and was first cited in 1706 in the Synopsis Palmariorum Matheseos by William Jones.

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