Question

The length and width of the park are measured in linear units: inches, miles, meters, etc. The area is measured in square units. Explain the reason for using square units for area of the park.

Answer 1

linear dimensions like inches, miles, meters, etc. can only be used to measure straight lines/distances. there's no way to represent a 2-dimensional quantity like area.

now, imagine a square with length and width 1 inch each. the area of the square is length * width, or 1 inch * 1 inch or 1 inch^2. notice that length and width are two dimensions. now imagine the park being made up of lots and lots of these tiny squares. the sum of all the squares would be the area of the park. that way, we use square units to represent two dimensional areas.