Real World Symmetry - Indicators: 1. Identify lines of symmetry of a given set of 2-D shapes, and explain why each shape is symmetrical. 2. Provide examples of symmetrical shapes found in the environment, and identify the line(s) of symmetry.
Students use GeoGebra to identify lines of symmetry on real world examples. They choose a what they believe is a line of symmetry. Then, students are taught how to plot the line of symmetry. Through trial and error they create additional plots on either side of the line of symmetry. When these plots demonstrate an accurate line of symmetry, the student can move the plot to create a mirrored tracing of the other half, to further demonstrate the symmetrical nature of the object.