LEARN NC

K–12 teaching and learning · from the UNC School of Education

Reflections across two mirror lines

http://illuminations.nctm.org/LessonDetail.aspx?ID=L472

A lesson plan for grades 9–12 Mathematics

Provider: National Council of Teachers of Mathematics


Learn more

Help

Please read our disclaimer for lesson plans.

Legal

This catalog record is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License. This license applies to the content of this page only and does not apply to the referenced website.

Using an interactive applet, students will learn what happens when a design is reflected twice across two different mirror lines. Illuminations provides detailed instruction for completing this lesson.

NCTM Standards and Expectations:

  • Use various representations to help understand the effects of simple transformations and their compositions.
  • Understand and represent translations, reflections, rotations, and dilations of objects in the plane by using sketches, coordinates, vectors, function notation, and matrices.
  • Use geometric ideas to solve problems in, and gain insights into, other disciplines and other areas of interest such as art and architecture.

North Carolina Curriculum Alignment