Shape
Copyright David & Cynthia Thomas, 2009
Symmetry--Directed Activity: Line Symmetry
Focus |
Line of symmetry |
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Technologies |
Metric ruler and The Geometers Sketchpad and model 4_Lines.gsp |
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Background |
Figure 4.2: Lines of Symmetry |
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Tasks |
For each object in Figure 4.2 · Draw a line of symmetry. · Draw a segment between two vertices that are “images” of each other relative to the line of symmetry. · Describe the relationship between the segment and the line of symmetry. · Repeat using The Geometers Sketchpad and model 4_Lines.gsp · Formulate and test a conjecture concerning all such segments. |