Question

cine ma ajuta si pe mine? e urgent dau coroana!​

Answer 1

La unghiul COA scrie 4x+15 grade sau 4x+5 grade?

Answer 2

Răspuns:

(<AOB)+(<BOC)+(<COA)=360°

2x+20°+3x+10°+4x+15°=360°

9x=360°-(20°+10°+15°)

9x=360°-45°

9x=315°

x=315°:9

x=35°

(<AOB)=35°×2+20°=90°

(<BOC)=35°×3+10°=115°

(<COA)=35°×4+15°=155°

(<BOM)=BOC:2=115:2=57°30'

(<CON)=(<COA):2=155°:2=77°30'

(<MON)=57°30'+77°30'=135°