Triangle Inequality Investigation

Move the sliders to adjust the lengths of the sides. Answer the questions at the bottom of the page for both of the given scenarios: 1) A triangle can be formed. 2) A triangle cannot be formed.

What is the side length of the longest side? What are the two side lengths of your two shorter sides? What do you notice about the side lengths when you can form a triangle? What do you notice about the side lengths when you cannot form a triangle?