Shape
Copyright David & Cynthia Thomas, 2009
Perimeter & Area of Polygons--Directed Activity: Inside a
Parallelogram
Focus |
Discovering properties of parallelograms |
Technologies |
The Geometers Sketchpad and model 3_ParallelogramProp.gsp. |
Background |
In Figure 3.20, diagonal AD and a segment drawn from B to E, the midpoint of side CD, divide the interior of parallelogram ABCD into polygonal regions. Figure 3.20: Polygons Inside a Parallelogram
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Tasks |
Using the Geometers Sketchpad model, investigate this figure thoroughly. Look for relationships between the areas of the polygons formed in the interior of the parallelogram. Look also for relationships between the segments formed. |