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Α΄ Γυμνασίου - Άθροισμα Γωνιών
Άθροισμα Γωνιών
Τι παρατηρείτε, σε κάθε περίπτωση, για τις μη κοινές πλευρές των δύο γωνιών ;
Μπορείτε να βγάλετε ένα γενικό συμπέρασμα ;