Question

A homeowner wants to build a circular patio. if the diameter of the patio is 20 feet, what is its area to the nearest whole number? 1,257 square feet 314 square feet

Answer 1

We are asked to find the area of patio. It is circular so formula used for area is given by:
$A= r^{2} \pi$
Where
r = radius = diameter / 2 = 20 / 2 = 10 feet

$A = 10^{2} \pi =100 \pi$
When we round this to the nearest whole number:
$A =100 \pi = 314.159=314ft^{2}$