Question

Follow the steps to find the Surface Area of the cube.
Shape: Cube
9 cm, 9 cm and 9 cm
What is the area of one side?
One sides: [?]
Total SA: [?]

Answer 1

To find the surface area of a cube, you can follow these steps:

1. **Determine the area of one side (face)**:
Each side of a cube is a square. The area \( A \) of a square is given by the formula:
\[
A = \text{side length}^2
\]
Given that the side length is 9 cm, the area of one side is:
\[
A = 9 \, \text{cm} \times 9 \, \text{cm} = 81 \, \text{cm}^2
\]

So, **one side area**: **81 cm²**.

2. **Calculate the total surface area (SA)**:
A cube has 6 identical faces. Therefore, the total surface area \( SA \) is calculated by multiplying the area of one side by the number of sides:
\[
SA = 6 \times A = 6 \times 81 \, \text{cm}^2 = 486 \, \text{cm}^2
\]

So, **Total Surface Area**: **486 cm²**.

### Summary:
- Area of one side: **81 cm²**
- Total Surface Area: **486 cm²**