Through the lesson, students gain an awareness of the pervasive use of angles, and these tools, for design purposes related to engineering and everyday uses.
After seeing some class practice problems and completing a set of worksheet-prompted problems, students share their methods and work. The lesson begins with a recap of the history and modern-day use of protractors, compasses and mirrors. Students learn about common geometry tools and then learn to use protractors (and Miras, if available) to create and measure angles and reflections.