Question

a = 12.56 feet
the diameter of a circle is 6 inches. find the area of the circle
(use 3.14 as the approximation of π)

Explanation:

Step1: Find the radius

The radius \(r\) of a circle is half of the diameter \(d\). Given \(d = 6\) inches, so \(r=\frac{d}{2}=\frac{6}{2}=3\) inches.

Step2: Use the area formula

The area formula of a circle is \(A=\pi r^{2}\). Substitute \(r = 3\) inches and \(\pi=3.14\) into the formula. Then \(A = 3.14\times3^{2}\).
First calculate \(3^{2}=9\), then \(A=3.14\times9 = 28.26\) square inches.

Answer:

\(28.26\) square inches