(Hoffer, 180) Translation Symmetry: is a transformation that moves all points in a plane a fixed distance in a given direction. The pre-image and image of any point are the same distance from the center of rotation. That is, after the isometry is applied to the figure, it looks the same.” (Hoffer, 668) In this curriculum unit, I will discuss three kinds of symmetry: Rotational Symmetry: is a transformation that turns a set of points about one point, the center of rotation. The word, “symmetry often refers to the figure which is an isometry that leaves the figure unchanged. Think and Communicate Question: Which figure has only one line of symmetry? If you said the answer is (C), you are correct. To put it gently, symmetry adds a sense of beauty to the world we live in. But it does tell us that it is the result of long development. History does not tell us who created the wheel nor when it was invented. “Trains, automobiles, streetcars, farm machines, wagons, and nearly all factory and mine equipment would be useless,” exerted from the Compton’s Reference Collection.

Even a mere hubcap of a vehicle has symmetry. For instance, without the wheel most of the world’s work would stop. They really like to be included in class lessons.

If so, let your students come up with some ideas. This may sound crazy or you may say that you lack a sense of creativity. I employ you to let your imagination expand beyond your wildest dreams. Symmetry in Wheels Ossie Riley Introduction What is so special about symmetry? How is symmetry used in our lives? Are there different forms of symmetry? If there are, how can we tell that symmetry exist? These are just a few questions that could be used to spark an interest in our students.

Reflection symmetry geometry x axis