Question

4.4 circumference and area of a circle
an architect is making a plan for a new circular playground. if the playground has a diameter of 64 meters. how much fencing will be need to go around the entire playground?

feet of fencing

Explanation:

Step1: Recall the formula for circumference

The formula for the circumference of a circle is $C = \pi d$, where $d$ is the diameter.

Step2: Substitute the given diameter

Given $d = 64$ meters, and taking $\pi\approx3.14$. Then $C=3.14\times64$.
$C = 200.96$ meters. Since 1 meter $\approx 3.28084$ feet, we convert: $200.96\times3.28084\approx 660$ feet.

Answer:

660