Question

Find the perimeter of the adjoining figure, which is a semicircle including its diameter.

Answer 1

Step 1: Calculate the radius

Given, diameter of semi-circle $d=10cm$.

We know that, radius

$\left(r\right)=\frac{d}{2}$

$=\frac{10}{2}=5cm$

Step 2: Calculate the circumference

We know that circumference of the semi-circle

$C=\pi r$

$=3.14\times 5=15.7cm$

Step 3: Calculate the perimeter

Now, perimeter $=$ circumference of the semi-circle $+$ semi-circle diameter

$p=C+d$

$=15.71+10=25.71cm$

Hence, the perimeter of the given figure is $25.71cm$.