A football has a radius of 8 cm. 

What is the surface area of the football? 

Surface area of a sphere = 4 π r² 

Use π = 3.14 

To calculate the surface area of a football (which we'll treat as a sphere), we can use the formula:

\[
\text{Surface Area} = 4 \pi r^2
\]

Given:
- Radius \( r = 8 \, \text{cm} \)
- \( \pi = 3.14 \)

Now, substitute these values into the formula:

\[
\text{Surface Area} = 4 \times 3.14 \times (8)^2
\]

First, calculate \( 8^2 \):

\[
8^2 = 64
\]

Now, substitute this back:

\[
\text{Surface Area} = 4 \times 3.14 \times 64
\]

\[
\text{Surface Area} = 4 \times 200.96
\]

\[
\text{Surface Area} = 803.84 \, \text{cm}^2
\]

So, the surface area of the football is \( 803.84 \, \text{cm}^2 \).

Would you like more details or have any other questions?

Here are 5 related questions:
1. What is the volume of the football if the radius is 8 cm?
2. How would the surface area change if the radius doubled?
3. What is the surface area of a sphere with a radius of 10 cm?
4. Can you calculate the surface area using a more precise value for \( \pi \) (e.g., 3.1416)?
5. How does the surface area formula change for ellipsoid shapes?

**Tip:** Surface area grows with the square of the radius, so even small changes in radius can significantly affect surface area!

A football has a radius of 8 cm. What is the surface area of the football? Surface area of a sphere = 4 π r². Use π = 3.14

Learn how to calculate the surface area of a football with a radius of 8 cm using the formula for the surface area of a sphere: 4πr². This problem provides a step-by-step guide, applying π = 3.14, resulting in a surface area of 803.84 cm². Suitable for students in Grades 6-8.

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