- Triangoli
- Triangoli: classificazione
- Triangoli: modificare le lunghezze dei lati
- Using dilation to show the sum of the angles in a triangle
- Pythagorean Theorem Proof Without Words
- The Sum of the Exterior Angles of Any Triangle
- Triangle Side Possibilities? (V2)
- Triangle Side Possibilities? (V1)
- Dissection: Triangle -> rectangle -> square
