Question

what is the perimeter of semicircle of radius 7cm?

Answer 1

i hope it will help you

Answer 2

Answer:

$Perimeter \: of \: the \\semicircle = 36 \: cm$

Step-by-step explanation:

Given radius of the semicircle (r) = 7 cm

$Perimeter (P) = \pi r + 2r\\=(\pi + 2)r\\=\left(\frac{22}{7}+2\right)r\\=\left(\frac{22+14}{7}\right)r\\=\left(\frac{36}{7}\right)r\\=\frac{36}{7}\times 7 \:cm$

$P = 36 \:cm$

Therefore,

$Perimeter \: of \: the \\semicircle = 36 \: cm$

•••♪