It is called the area.
area
You figure out the square footage, and then the size and number of boards needed.
figure out what the square number might be
If the square root is an integer, it's a square number.
It is the surface area of the solid.
That's the figure's "area".
Area is the number of square unit needed to cover a surface. Perimeter of a figure is the distance around the figure Perimeter is measurements of each sides added.
multiply it by itself
It is the area of the figure.
surface area
figure it out
Is its area.