Answer :
Step-by-step explanation:
Length of arc
[tex] = \frac{ \theta}{360 \degree} \times c \\ \\ = \frac{72 \degree}{360 \degree} \times 20\\ \\ = \frac{1}{5} \times 20 \\ \\ = 4 \: units \\ [/tex]
Step-by-step explanation:
Length of arc
[tex] = \frac{ \theta}{360 \degree} \times c \\ \\ = \frac{72 \degree}{360 \degree} \times 20\\ \\ = \frac{1}{5} \times 20 \\ \\ = 4 \: units \\ [/tex]