Define a 30-60-90 triangle and the relationship between its sides
Relationships of Sides in 30-60-90 Right Triangles Interactive
Solves a 30-60 right triangle given the length of one of its sides.
Practice Relationships of Sides in 30-60-90 Right Triangles questions
Covers the isosceles right triangle, the 30-60-90 special right triangle, and the ratios that the special triangles have.