# What is the perimeter of semicircle if \pi=3,142 and d=10

What is the perimeter of semicircle if $\pi =3,142$ and $d=10$
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ol3i4c5s4hr
The perimeter of a circle:
$P=2\pi r=\pi d$, where r ia radius and d is diameter.
Here, it is a semicircle, a half of a circle
$⇒\frac{1}{2}×2\pi r=\pi r$ is the perimeter
$d=10⇒r=\frac{10}{2}=5$
$P=\left(\pi ×5\right)+10$
$=\left(3.142×5\right)$
$15.71+10=25.71cm$

Ana Robertson
Thank you so much