In another example, to demonstrate the conjecture that the sum of the exterior angles of a polygon is 360 degrees, students can draw a polygon with its exterior angles. Dynamic dilation reduces the polygon to a point, while keeping the angle measures the same, to demonstrate the conjecture's validity. Sketches are visual, geometric drawings created with Sketchpad. Scripts are verbal recordings of geometric constructions of objects and their relationships to one another. When a script is played, a sketch is constructed.
Scripts provide a tool for communicating mathematics.
Software provides presentation sketches, such as billiards, where a user is able to drag the cue stick to determine at what angle the ball must be hit to enter a desired pocket. Sample sketches, such as the rose petal, permit observing the effects of changing the polar equation's radius or angle by changing the length of a control bar. User guide, teaching notes, and sample activities are included. Children's Software Revue. The link is to the homepage of Children's Software Revue.