Question

va rog ajutor! am nevoie urgent!ma abonez si va dau coroana! va rog!!!!​

Answer 1

1)AOB+BOC+COD+DOA sunt unghiuri in jurul unui punct, deci suma lor va fi de 360°

90°(unghi drept) +60°+50°+m COD=360°

COD=360°-(90+50+60)

COD=360-200

COD=160°

ABC+CBD+DBE+EBA=360°

EBA=ABC+2°=>ABC=EBA-2

=CBD+4°=>CBD=EBA-4

=DBE+6°=>DBE=EBA-6

EBA-2+EBA-4+EBA-6+EBA=360°

4EBA-12°=360°

4EBA=360°-12°

4EBA=348°

EBA=348°:4

EBA=87°

ABC=87-2=85°

CBD=87-4=83°

DBE=87-6=81°