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.