- A triangle with angle degree measures of 30, 60, and 90 is a special right triangle
- Corresponding to opposite angle measures, the ratio of the side lengths of every 30-60-90 triangle is 1:√3:2
- In plain language, the hypotenuse is twice as long as the shortest leg (opposite the 30 degree angle), and the longest leg (opposite the 60 degree angle) is √3 times longer than the shortest leg
- Application: finding the other 2 side lengths of a 30-60-90 triangle given one side length