Answer:
[tex]L_s=7.85\ m[/tex]
Step-by-step explanation:
Length Of Semicircles
The length of a circle or radius r is
[tex]L=2\pi r[/tex]
A semicircle has half this length:
[tex]L_s=\pi r[/tex]
The radius of the flowerbed is 2.5 m, thus the length of the edging material needed to border the lawn design is
[tex]L_s=\pi (2.5)=(3.14)(2.5)=7.85\ m[/tex]
[tex]\boxed{L_s=7.85\ m}[/tex]
