In this video we'll learn about the special properties of 30-60-90 triangles, which are triangles that have interior angle measures of 30 degrees, 60 degrees, and 90 degrees. With these kinds of triangles, there's always a special relationship between the side lengths.

Streaming video file encoded with permission for digital streaming by Infobase on April 25, 2015.

30-60-90 Triangles: Geometry-Triangles --(10:06).