Kolmnurga sisenurkade summa

Author:erlikontkar

Voldi kokku kolmnurga nurgad (liigutades "Volditud" liugurit) ning näed, et nurkade summa on 180 kraadi. Muuda kolmnurga kuju ja suurust (nihutades kolmnurga tippe) ning veendu, et nurkade summa ei muutu.

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