Answer:
Step-by-step explanation:
The missing figure is attached.
You can notice that the design is a cube.
A cube has 6 faces which are all squares.
The area of a square can be calculated with this formula:
Where "s" is the length of any side of the square.
In this case, you can observe in the figure that:
Therefore, substituing that value into the formula, you get that the area of any of the cube's faces is:
Finally, in order to find the surface area of the cube, you need to multiply the area of a face calculated above, by 6.
Therefore, the surface area of the design is:
