Question

find the area.
a = ? in²
a = πr²
use π = 3.14

Explanation:

Step1: Substitute the radius into the formula

Given the formula for the area of a circle \(A = \pi r^{2}\), and \(r = 11\) in, \(\pi=3.14\).
So \(A=3.14\times11^{2}\).

Step2: Calculate \(11^{2}\)

\(11^{2}=11\times11 = 121\).
Then the formula becomes \(A = 3.14\times121\).

Step3: Multiply to get the area

\(3.14\times121=379.94\) (using standard multiplication of decimals: \(3.14\times121=(3 + 0.14)\times121=3\times121+0.14\times121 = 363+16.94=379.94\)).

Answer:

\(379.94\)