Răspuns :

Aurelcraciun59id

Răspuns:

Explicație pas cu pas:

1)

∡AOB+∡BOC=160°

3∡BOC+∡BOC= 160°

4∡BOC= 160°

∡BOC=160:4

-

∡BOC= 40 °

-

∡AOB= 3*40

-

∡AOB= 120 °

-

-

2)

∡AOB+∡BOC= 100°

∡AOB+4∡AOB= 100°

5∡AOB= 100°

∡AOB= 100:5

-

∡AOB= 20 °

-

∡BOC= 4*20

-

∡BOC= 80 °

-

-

3)

∡AOB+ ∡BOC= 150

∡BOC+10+∡BOC= 150

∡BOC+∡BOC= 150-10

2∡BOC= 140

∡BOC= 140:2

-

∡BOC= 70°

-

∡AOB= 70+10

-

∡AOB= 80 °

-

4)

∡AOB+∡BOC=110°

∡BOC-30+∡BOC= 110°

∡BOC+∡BOC= 110+30

2∡BOC=140°

∡BOC= 140:2

-

∡BOC= 70 °

-

∡AOB= 70-30

∡AOB= 40 °

ID Alte intrebari