The purpose of this app is to show a student how to quickly determine or estimate the area of several regular geometric shapes easily and effectively by placing them "INSIDE A BOX" (square or rectangle) and using simple techniques. The advantage of this approach is instead of having to learn multiple formulas, a student can use simple techniques that can be applied to a shape to determine its area.
Area is the measurement of the number of square units INSIDE the surface of a 2D shape. Hence, it is always measured in square units (e.g., 12 in2).