Answer:
3
Step-by-step explanation:
Recall that the full circumference of a circle can be represented by an angle of 360°.
In our case, we are asked to find the arc AB on the circumference of a circle that is represented by an angle of only 20°
hence the fraction of the circumference that is represented by arc AB
= 20° / 360°
= 1/18
we can thus say that the length of AB is 1/18 of the total circumference
Arc Length of AB
= (1/18) of total circumference
= (1/18) x 2π x radius
= (1/18) x 2π x 27
= 3π units
