Question

Se considera un ∆ ABC si puncctele E ai F pe (AB), respectiv (AC) astfel incat EF || BC.
Daca m( ung.ABC)=50° si m( ung.EFC)=110°, calculati m( ung. AEF) si m( ung.ACB). Va rog urgent!!!

Answer 1

m(∡AEF)=m(∡ABC) (unghiuri determinate de o secanta, AB)
m(∡EFC)=110° =>m(∡AFE)=180°-110°=70°
m(∡FAE)=180°-70°-50°=60°
=>m(∡ACB)=180°-60°-50°=70°