Lesson objective: Describe single transformations in the coordinate plane.

This lesson provides an opportunity for students to apply their knowledge and understanding of transformations and the coordinate plane to a mathematical situation. Students are asked to identify single transformations used to complete a pattern.

Key Concept students will use:

- A two-dimensional figure is congruent to another if we can describe a sequence of reflections, rotations, or translations on the first that produces the second.

Skills students will use:

- identifying transformations in the coordinate plane
- describing transformations in the coordinate plane

Students engage in Mathematical Practice 8 (look for and express regularity in repeated reasoning) as they decide which transformations were used to transform the figures in creating the pattern.

**Key vocabulary: **

- center of rotation
- line
- line of reflection
- origin
- point
- reflect
- rotate
- translate

**Special materials needed:**

- patty paper (optional)
- transparency and wet or dry-erase markers (an optional alternative to patty paper)