# Which 3 Line Segments Make a Triangle?

- Author:
- HJ

- Topic:
- Line Segment

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.