Today we discovered the triangle inequality theorem by attempting to build triangles with different side combinations. Students worked with partners and tried to build 8different triangles out of straws. Some of the triangles could be made, while others could not. This helped us to prove the theorem - that the sum of any 2 sides of a triangle MUST be greater than the 3rd side.
The activity went very well. We will be continuing to focus on sec. 3.6 again tomorrow, looking at applying the new theorem to real life problems.
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