Opposite Parts Theorem
This applet has a triangle with all of the sides and angles labeled with their measurements. Students should adjust the vertices and observe where the largest sides and angles are, as well as where the smallest sides. You should observe the relationship between the Opposite Parts of any triangle, which I call the Opposite Parts Theorem.
Opposite Parts Theorem: As you adjust the vertices of the triangle, observe: Where are the Largest Side and Largest Angle in the triangle? Where are the Medium Side and Medium Angle in the triangle? Where are the Smallest Side and Smallest Angle in the triangle?