Question

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

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: Use the area formula

The area formula of a circle is \( A=\pi r^{2}\). Substitute \( r = 2\) into the formula: \( A=\pi\times(2)^{2}\).

Step3: Calculate the result

\( A=\pi\times4 = 4\pi\)

Answer:

\(4\pi\)