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Students look at two triangles and must prove whether one line is longer than another. The results are surprising, and there are many different ways to prove the answer to be true.
This resource was reviewed using the Curriki Review rubric and received an overall Curriki Review System rating of 3, as of 2009-07-26.
This is a great way to encourage students to use critical thinking. Students may think of this type of work as a puzzle more than an assignment.