In this lesson, the students will be experimenting to show how light shines in a straight line. They will also be experimenting to see how light reflects using mirrors. The students will be working in cooperative learning groups to carry...

This lesson focuses on rigid transformations, a specific set of rules that convert one geometric figure into another one. There are many different types of transformations, like reflections or rotations. It provides several practice...

In this task, 8th graders are presented with several rectangles that have diagonal lines through them and are placed on grids. They are asked to draw reflections and to discuss rectangles that are squares. Aligns with 8.G.A.

Build your own polygon and transform it in the Cartesian coordinate system. Experiment with reflections across any line, rotations about any point, and translations in any direction.

In this task, 8th graders are given the coordinates of a point and are asked to find the coordinates of its reflection across a line parallel to the x-axis. Aligns with 8.G.A.3.

Watch as two particles move through a confined area. The emphasis is on their motion in a straight line until they encounter a barrier and are reflected off in a different direction.

This site offers a short discussion of transformations. The discussion has few pictures and expresses the transformations in terms of relative coordinates rather than pictures.

Students learn about reflection. An activity, examples, tricks, and a definition are included.

The purpose of this task is to explore reflections in the context of paper folding. Each fold is associated with a line of reflection and understanding each step in the construction requires careful analysis of angles and of the...