The area of two-dimensional figures varies depending on the object. For the simpler two-dimensional figures (square, rectangle, parallelogram), the area can actually be found by calculating the number of square units in the interior of the object. Such a task can be difficult and time consuming, so mathematicians simply multiply the height *(h)* times the base *(b),* sometimes said as length times height or length times width (with rectangles). (For more information about the area of geometric figures, see the Appendix 2: Common Formulas for Calculating Areas and Volumes of Shapes).