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Triangle Inequality Theorem

Directions: Change the side lengths of the triangle (a, b, and c). Pay attention to what lengths work as a triangle and which do not.

Give two examples of triangle side lengths that work. Why do these work?

Give two examples of triangle side lengths that do not work. What do you notice about these side lengths?

Write a rule for how you can determine if side lengths will create a triangle or not. Then test out your theory!