Question

A window in the shape of a semi-circle has a radius of 40 cm. The window is shown below.Find the area of the window. (Use pi = 3.14)

Answer 1

In order to calculate the area of a semi-circle, we can use the formula below:

`A=(\pi r^2)/(2)`

For pi = 3.14 and r = 40 cm, we have:

`\begin{gathered} A=(3.14\cdot40^2)/(2) \\ A=(3.14\cdot1600)/(2) \\ A=3.14\cdot800 \\ A=2512\text{ cm}^2 \end{gathered}`

Therefore the window area is 2512 cm².