45 45 90 Triangle

45 45 90 Triangle

The triangle defined by the three angles, 45°, 45°, and 90°, is a special triangle in geometry. The triangle is formed by a right triangle whose adjacent and opposite sides have the same length. The generic form of the triangle is shown below:

45 45 90 Degree Triangle

The properties of this special triangle show up in geometry and applications as the angle represents an eigth of a full rotation.