How it works ?
- The SAS Triangle Congruence Theorem states that if 2 sides and their included angle of one triangle are congruent to 2 sides and their included angle of another triangle, then those triangles are congruent. The applet below uses transformational geometry to dynamically prove this very theorem.
- Interact with this applet below for a few minutes, then answer the questions that follow.
- As you do, feel free to move the BIG WHITE POINTS anywhere you’d like on the screen!