Answer:
see explanation
Step-by-step explanation:
The length of the arcs are calculated as
arc = circumference of circle × fraction of circle
(13)
arc = 2πr ×[tex]\frac{72}{360}[/tex]
= 2π × 25 × [tex]\frac{1}{5}[/tex] = 10π units
(14)
arc = 2π × 2 × [tex]\frac{270}{360}[/tex]
= 4π × [tex]\frac{3}{4}[/tex] = 3π units
