Final answer:
To tile a kitchen floor, one must know the area to determine the amount of tile needed, as this measurement represents the surface to be covered.
Step-by-step explanation:
When planning to tile a kitchen floor, the measurement of interest is the area and not the perimeter. This is because area represents the actual surface that will be covered by tiles, whereas the perimeter is just the measure around the edges of the kitchen floor. To determine the amount of tile needed for the flooring project, we use the length and width of the kitchen to calculate the area. Once you have both measurements, you can multiply them together to find the total square footage that needs to be covered with tiles.