Question

Find the perimeter. Approximate the result to the nearest tenth using 3.14 for π.

Answer 1

In order to find the perimeter of this figure, let's calculate the length of the semicircle at the top of the figure.

The diameter of the semicircle is equal to 5 meters, so the radius (which measures half the diameter) is equal to 2.5 meters.

Now, to calculate the length of the semicircle, we can use the formula below:

`\begin{gathered} C=\pi r \\ C=3.14\cdot2.5 \\ C=7.85 \end{gathered}`

Calculating the perimeter of the figure, we have:

`\begin{gathered} P=7.85+9+5+9 \\ P=30.85 \end{gathered}`

Rounding to the nearest tenth (half even method), we have a perimeter of 30.8 meters.