Question

the diameter of a circle is 4 ft. find its area in terms of π. answer attempt 1 out of 2 a = ft² π

Explanation:

Step1: Find the radius

The radius $r$ of a circle is half of the diameter $d$. Given $d = 4$ ft, so $r=\frac{d}{2}=\frac{4}{2}=2$ ft.

Step2: Calculate the area

The area formula of a circle is $A=\pi r^{2}$. Substitute $r = 2$ into the formula, we get $A=\pi\times(2)^{2}=4\pi$ $ft^{2}$.

Answer:

$4\pi$