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Mathematics, 07.12.2020 16:50 xoxzyanya61

Ex12/150-manual de clasa a 8-a Punctele A, B, C aparţin unui cerc în această ordine. Aflaţi:
a) m( ( AB), dacă m( (ACB)=100°;
b)m( (ACB),dacă m( (AB)=140°;
c)m( (AC), dacă m( (ABC)=25°;
d)m( (BC),dacă ( AB= (BC= ( AC.
Ex13/150
aflați măsură a a unghiului (O este centrul cercului):

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