Respuesta :

ktrav258

Answer:

30cm

Step-by-step explanation:

a circle is 360 degrees

120/360 = 1/3 the circumference

90 cm * 1/3 = 90 / 3 = 30

Answer:

30 cm

Step-by-step explanation:

The length of the arc AB is calculated as

circumference × fraction of circle subtended by AB, that is

AB = 90 × [tex]\frac{120}{360}[/tex]

     = 90 × [tex]\frac{1}{3}[/tex] = 30 cm