π είναι ο λόγος του μήκους της περιφέρειας οποιοδήποτε κύκλου προς την διάμετρό του.
Η τιμή του π ή Pi έχει άπειρα δεκαδικά ψηφία, αλλα συνήθως θεωρούμε οτι π=3.14 για απλοποίηση
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Εξαρτάται. Συνήθως εκφράζει τόξο κύκλου 180 μοιρών νομίζω.
Ο βασικός ορισμός του π είναι ο λόγος της περιφέρειας ενός κύκλου προς τη διάμετρό του, δηλαδή L/δ. (βλ. και απάντηση του Άγγελου).
Οι γωνίες μετριούνται είτε με μοίρες, είτε με ακτίνια (rad).
Γωνία π ακτινίων (π rad) ονομάζουμε τη γωνία που είναι ίση με 180 μοίρες.
π είναι ο λόγος του μήκους της περιφέρειας οποιοδήποτε κύκλου προς την διάμετρό του.
Η τιμή του π ή Pi έχει άπειρα δεκαδικά ψηφία, αλλα συνήθως θεωρούμε οτι π=3.14 για απλοποίηση