Question

Half of circle is called a semicircle.a semicircle has a diameter of 30 inches.what is the area of the window to the nearest square inch

Answer 1

Answer:

$A=353\ in^2$

Step-by-step explanation:

The question is

A window is shaped like a semicircle with a diameter of 30 inches. What is the area of the window? Round to the nearest square inch

we know that

The area of semicircle is equal to

$A=\frac{1}{2}\pi r^{2}$

we have

$r=30/2=15\ in$ ---> the radius is half the diameter

substitute

$A=\frac{1}{2}\pi (15)^{2}$

$A=112.5\pi\ in^2$

assume

$\pi =3.14$

$A=112.5(3.14)=353,25\ in^2$

Round to the nearest square inch

$A=353\ in^2$