Răspuns:
6) m(<COD)=m(<AOB)+m(<BOC)+m(<AOD)=60°+50°+90°=112°+90°=200°
7) m(<ABE)=m(<CBD)=(360°-2×58)÷2=(360-160°)÷2=244°÷2=122° <ABC+<CBD+<DEF+<EBA=360° m<(ABC)=m(<DBE)=58° unghiuri congruiente
