Question

What part of the circumference is an arc whose measure is 30°?

1/12
1/10
1/8
1/6

Answer 1

1/12

Explanation:

The whole circumference (i.e complete circle) is an arc which measures 360°

in our case, it is given that our arc measures only 30°

the fraction of our arc of 30° to the complete circle of 360° is

30/360

= 3/36

= 1/12