Question

Perimeter of the ☝️ figure is -------​

Answer 1

$\LARGE\underline{\underline{\sf \red{Given}:}}$

• Radius (r) = 7cm

$\LARGE\underline{\underline{\sf \red{To\:Find}:}}$

• Perimeter of semi-circle = ?

$\LARGE\underline{\underline{\sf \red{Solution}:}}$

We know that :

Perimeter of circle is actually Circumference of circle .

For semi-circle :

$\large{\boxed{\sf C=\frac{πr}{2}}}$

$\implies{\sf \dfrac{22×7}{7×2} }$

$\implies{\sf 11\:cm }$

$\LARGE\underline{\underline{\sf Answer:}}$

•°• Perimeter of semi-circle is 11 cm.

Answer 2

$\large \underline{ \underline{ \sf \:Given : \: \: }}$

$\star$Radius of circle = 7 cm

$\large \underline{ \underline{ \sf \: To \: find : \: \: }}$

$\star$Circumference or perimeter of semi circle

$\large \underline{ \underline{ \sf \: Solution : \: \: }}$

The circumference of semi circle is given by :

$\sf \large \red{ \fbox{ \fbox{Circumference = \frac{2\pi r}{2} }}}$

$\sf = \frac{ 2 \times 22 \times 7 }{ 7 \times 2} \\ \\ \sf = \frac{ \cancel{14} \times 22}{ \cancel{14}} \\ \\ \sf = 22 \: \: cm$

Therefore , the circumference of circle is 22 cm