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U0%%FF2222%2 **FF$jFFjGraphing Translations and Reflections in Geometry
Have students form groups of four and give each group a card to have them perform the given translation or reflection.
The students should be logged onto navigator and the teacher should be using activity center.
Each member of the group should plot one point from the given figure and one point from the translation or reflection. The rest of the class should be trying to figure out if the group is doing a translation or reflection and what does a translation do to a figure and what does a reflection do to a graph.
Some examples to use on the cards given to groups:
Group 1: Plot a triangle. From your triangle, plot a translation 3 points down and 4 points to the right. **Ask the class through a quick poll, do the points graphed resemble a translation or reflection? After the quick poll, have the students justify their answer.
Group 2: Plot a quadrilateral. From the quadrilateral, plot a reflection about the x axis. **Use quick poll to ask the students if it is a reflection or translation. After the quick poll, have the students justify their answer.
Group 3: Plot a triangle. From the triangle, plot a reflection about the y axis. Once again after this is plotted, use quick poll to let the students determine if it is a translation or reflection. Once again, after the quick poll, have the students justify their answer.
And so on.From this activity the students should see that translations are shifts and reflections are mirror images.
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