Lauretta J. Fox
In mathematics, the word area is used to denote the measure of a surface. square units, such as square inches, square meters, or square miles are the standard units used in measuring surface area. One square unit is a square that measures one unit on each side. The area of any plane figure is the number of square units that are contained within the figure. Area is always expressed as a positive number.
1 inch
(figure available in print form)
This is one linear inch. It is a unit used in measuring the length of a line segment.
(figure available in print form)
This is one square inch. It is a square each of whose sides is one inch long. It is used as a unit of measure of area.
The polygon JKLM has been divided into squares whose sides are each one unit long. The figure contains eighteen squares of the same size, therefore its area is eighteen square units.
