Question

find the area of a circle whose diameter is 3.6 m. use 3.14 for $pi$. (round to 4 decimal places.)

Explanation:

Step1: Find the radius

The radius $r$ of a circle is half of the diameter $d$. Given $d = 3.6$ m, so $r=\frac{d}{2}=\frac{3.6}{2}=1.8$ m.

Step2: Calculate the area

The formula for the area $A$ of a circle is $A=\pi r^{2}$. Substitute $r = 1.8$ m and $\pi=3.14$ into the formula: $A = 3.14\times(1.8)^{2}=3.14\times3.24 = 10.1736$ $m^{2}$.

Answer:

$10.1736$