Question

How do we solve the circumference of a semi-circle?

Answer 1

`C\text{ = }\pi r`

Step-by-step explanation:

Formula for calculating the circumference of a circle is expressed as;

`C\text{ = 2}\pi r`

r is the radius

Since a semi-circle is half of a circle, then the circumference will be half of cirumference of a circle as shown;

`\begin{gathered} C\text{ = }(2\pi r)/(2) \\ C\text{ = }\pi r \end{gathered}`

This gives the circumference of s semicircle where r is the radius of the semi circle