Challenge 23: Side-Side-Side (SSS)
- Gerry Stahl
If all three sides of one triangle are equal to the corresponding sides of another triangle, then the two triangles are congruent. This is called the “Side-Side-Side” (or “SSS”) rule. In dynamic geometry, you can make the 3 side lengths of one triangle be dependent on the corresponding 3 side lengths of another triangle, ensuring that the two triangles will always be congruent.