Sphere Surface Area Calculation

To find the surface area of a sphere, we use the specific formula related to its radius.

Surface Area Formula

The formula for the surface area ($A$) of a sphere is:

$ A = 4 \pi r^2 $

where '$r$' is the radius of the sphere.

Applying the Formula

We are given:

• Radius ($r$) = 8 cm
• Value of $\pi$ = 3.14

Substitute these values into the formula:

$ A = 4 \times 3.14 \times (8 \text{ cm})^2 $

Step-by-Step Calculation

1. First, calculate the square of the radius:

   $ (8 \text{ cm})^2 = 64 \text{ cm}^2 $

2. Next, multiply 4 by $\pi$:

   $ 4 \times 3.14 = 12.56 $

3. Finally, multiply the results from the previous steps:

   $ A = 12.56 \times 64 \text{ cm}^2 $

   $ A = 803.84 \text{ cm}^2 $

Result

The surface area of the sphere is $803.84 \text{ cm}^2$.