Today, we started our section on triangles, and I was very excited because I feel pretty comfortable identifying and measuring triangles. We did several activities today, but one really stood out to me because it was a fun and engaging way to understand the angles of a triangle. In one of the activities we did, we drew a decently sized triangle on a piece of paper and then we cut it out. We needed to classify our triangle and write the classification on the triangle. After we had finished making our triangles, we then had to tear all three corners off. Believe me when I say that it was the hardest thing for me to do since I had made a beautiful acute equilateral triangle.
However cringeworthy it maybe have been, it was necessary to have one rough edge so you knew which part was the ends of the triangle. After that, we put the ends of the triangle together and it created a straight line. The purpose of this activity was to show that all three angles of a triangle will add up to 180 degrees which is the measurement of a line or a straight angle. I will definitely be using this with the fourth graders I am currently working with as well as in my future classroom. Below are photos of the activity.
I seriously loved this lesson though. It was such an ah-ha moment. It was funny to see your reaction and others when we were told to rip of the angles on out triangle. It's moments like these that I look back on and think how fun we have as a class, and how fun learning can be. Thanks for sharing!!
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