Are These Right?

This Are These Right? lesson plan also includes:

Is that a right triangle or a wrong triangle? Young mathematicians look at eleven different shapes and use a measuring tool of their choice to determine which triangles have right angles. Consider cutting out sets of the shapes to provided to students who request them. Allow for a follow-up discussion in which different approaches to solving the problem are shared.

172 Views 157 Downloads
CCSS: Designed
  • Includes a variety of different triangles
  • Activity clearly addresses the ability to identify right triangles
  • Students are free to develop unique approaches to solving the problem
  • The included shapes are relatively small, making angle measurement difficult
Common Core