This document defines area and perimeter, and provides formulas to calculate the area of different shapes. It defines area as the space occupied by a flat shape and explains that area is measured in square units. Formulas are given for calculating the area of a square, rectangle, parallelogram, triangle, and trapezoid using measurements of sides and other key dimensions. The key difference between perimeter and area is also explained, with perimeter being the distance around a figure and area being the space inside measured in square units.