Let's further examine the concept of area, using a geoboard. The unit of area on the geoboard is the smallest square that can be made by connecting four nails:
We will refer to this unit as 1 square unit.
On the geoboard, the unit of length is the vertical or horizontal distance between two nails. Perimeter is the distance around the outside of a shape and is measured with a unit of length.
Use the following Interactive Activity to work on the geoboard problems in Part B. For a non-interactive version, use an actual geoboard and rubber bands, or print the dot paper worksheet (PDF). Use a space enclosed by five dots both vertically and horizontally to represent a single geoboard.
This activity requires the Flash plug-in, which you can download for free from Macromedia's Web site.