# Which 3 Line Segments Make a Triangle?

1. Drag vertices or use sliders to change lengths of line segments. Try until you have made two different triangles. Keep track of which DO and which DO NOT make a triangle.
Line segments that DO make triangles have this in common:
Line segments that DO NOT make triangles have this in common:
2. Make a

**conjecture**: In order to make a triangle... 3.**Justify**your conjecture using diagrams and what you know about triangles.## New Resources

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