Shape
Copyright David & Cynthia
Thomas, 2009
Transformation Geometry--Directed Activity: Reflection
Focus |
Reflection using coordinate geometry. |
Technologies |
5 mm grid paper, The Geometers Sketchpad and the model 5_Reflections.gsp |
Background |
Figure 5.23 shows ΔABC and three mirrors corresponding to three reflections, m, n, and o.
Figure 5.23: Reflections |
Tasks |
· Using coordinate geometry and 5 mm grid paper, find the image of ΔABC (i.e., give the coordinates of the vertices) under reflection
§ First m, then n, then o § First n, then m, then o § First o, then m, then n
· Check your findings using The Geometers Sketchpad, and the model 5_Reflections.gsp |