 | Area Tool |  | Investigate how changes in the base and height of trapezoids, parallelograms, and triangles affect their area. |
 | Canada Data Map |  | Use color coding to represent data about the Canadian provinces and territories, including population, land area, and gas usage. |
 | Circle Tool |  | Compare the circumference and area of a circle to its radius and diameter. |
 | Computing Pi |  | Compare two methods for computing pi. |
 | Factorize | | Divide numbers into two factors, and build arrays to represent each factorization. |
 | Interactive Geometry Dictionary: Areas in Geometry | | Understand and investigate the area of the rectangle, parallelogram and triangle. |
 | Isosceles Triangle Investigation |  | Investigate the relationship between the area of an isosceles triangle and the length of its base. |
 | Parallelogram Exploration Tool | | Investigate the resulting areas when two parallel segments are constructed through a point on the diagonal of a parallelogram. |
 | Scale Factor | | A common misconception is that when the dimensions of an object are doubled, the area is doubled, too. But this is not true! Use this applet to investigate how changes in the scale factor influence the ratio of perimeters and the ratio of areas between two figures. |
 | Square Graphs | | Explore the graphs that result when two characteristics of a square (side length, diagonal length, perimeter, area) are plotted. |
 | State Data Map | | Use color-coding to represent state information, such as population, area, and gasoline usage. |
