Question

I need some help on these two questions.

Answer 1

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 ×$\frac{72}{360}$

      = 2π × 25 × $\frac{1}{5}$ = 10π units

(14)

arc = 2π × 2 × $\frac{270}{360}$

      = 4π × $\frac{3}{4}$ = 3π units