Questions: Use your equation to find the approximate area of the disk.
You can use 3.14 as an approximation for π.
A = π * 18^2
The area of the disk is about square cm.
Transcript text: Use your equation to find the approximate area of the disk.
You can use 3.14 as an approximation for $\pi$.
\[
A=\pi \cdot 18^{2}
\]
The area of the disk is about
$\square$ square cm.
Solution
Solution Steps
Step 1: Calculate the square of the radius
The radius is given as 18 cm. The square of the radius is $18^2 = 18 * 18 = 324$.
Step 2: Multiply by pi
The formula for the area of a circle is $A = \pi r^2$. We are given an approximation of $\pi \approx 3.14$. So, the area is approximately $3.14 * 324$.