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  • Noel McMillin

    November 9, 2022 at 9:07 am

    Triangle Angle Sum

    Traditionally, one of two lessons happens with this theorem. Some teachers will have the students cut out triangles of varying sizes and shapes. Then the students, with the teacher leading, snip each of the three corners lining them up to construct a straight line. The other lesson is simply the teacher telling the students that the interior angles of a triangle add to 180 degrees – like the textbook picture I attached. I know this because I have done both of these lessons.

    Taking inspiration from this class, I plan to project this picture on the screen and then see what happens. My plan is to do this on Monday so I will post the results of the lesson early next week. I am excited to see where this takes us. I have an idea, as a 25-year math teacher, but I’m hoping it goes places I never anticipated, honestly.

    In the not-too-distant future, we will tackle the interior angle sum of all polygons and I think this will be a great anchor problem to use over and over.