## Lesson: Transformations

Developing the Concept

Students have learned how to perform translations, rotations, and reflections. Now they will practice what they have learned.

**Materials:** overhead transparencies with coordinate grids on them, overhead washable pen, ruler; graph paper, ruler, and pencil for each student

**Preparation:** Four overhead grid transparencies with a trapezoid, a scalene triangle, a rectangle, and any other quadrilateral drawn on one of the five transparencies.

**Prerequisite Skills and Background:** Students should be familiar with various types of triangles and quadrilaterals. They should also have some familiarity with graphing points on a coordinate grid. Students should know the various types of angles and have an ability to use a ruler and protractor. They should also have knowledge of translations, rotations, and reflections.

**Wrap-Up and Assessment Hints**

One way to informally assess your students about their understanding of these transformations is to ask them to find examples of them in the classroom, around the school, or at home. For example, tiles on a floor can be used to illustrate translations.