Answer:
The perimeter of the given semi-circle in terms of [tex]\pi [/tex] is
[tex]P=9\pi [/tex] cm
Step-by-step explanation:
Given that the diameter of the semi-circle is 18cm
That is d=18cm
Therefore radius [tex]r=\frac{d}{2}[/tex]
[tex]r=\frac{18}{2}[/tex]
Therefore radius r=9cm
To find the perimeter of the semi-circle :
perimeter of the semi-circle[tex]P=\pi r[/tex]
[tex]P=\pi\times 9 [/tex] cm (where r=9 cm )
[tex]P=9\pi [/tex] cm
The perimeter of the given semi-circle in terms of [tex]\pi [/tex] is
[tex]P=9\pi [/tex] cm
