In Part B, you made relative comparisons involving mixtures. Scaling is another type of relative comparison problem. Scaling is used in graphic design, cartography, construction, and many other areas. In fact, if you have ever doubled a recipe or built a model airplane, you have dealt with problems of scale.
This Interactive Activity compares the effects of absolute and relative comparisons on a picture. Think about what would happen to a drawing if every line were made half as long. Would it look like the same picture at all? What would happen if you made every line a half-inch shorter? In this activity, you will see the effects of these changes on Quadperson, a drawing of a face made of quadrilaterals.
This activity requires the Flash plug-in, which you can download for free from Macromedia's Web site. If you prefer, you can view the low-tech version of this
activity, which doesn't require the Flash plug-in.