Chapter 11, Problem 12RP

To determine

To calculate:Thearea of semicircle whose diameter is $14mm$ .

Answer to Problem 12RP

The area of semicircle is $77m{m}^2$ .

Explanation of Solution

Given information:

Diameter of a circle $=14mm$

Formula used:

Area of a circle: $A=\pi r^2$

r = radius of a circle.

Calculation:

  

  $\begin{array}{l}d=14mm\\ r=\frac{d}{2}=\frac{14}{2}=7mm\end{array}$

  $\begin{array}{l}{A}_{Semicircle}=\frac{1}{2}\pi r^2\\ A_{Semicircle}=\frac{1}{2}\pi {(}^7\\ A_{Semicircle}=\frac{49}{2}\pi \\ A_{Semicircle}=77m{m}^2\end{array}$