# 45 45 90 Triangle

The right triangle defined by the three angles: , and is a special triangle that has meaningful properties in mathematics.

The general form of the triangle, shown below, is given in terms of , where the adjacent and opposite sides are of length .

The same triangle can also be measured in radians, where radians is equal to a full rotation.

A right triangle is a triangle where one of the three angles is a perpendicular angle. There are three sides of the right triangle: the adjacent, opposite, and hypotenuse sides.

There are two special right triangles in geometry defined by their three angles the 45 45 90 degrees and the 30 60 90 degrees.

Degrees is a unit of measure for angles. A full rotation is equal to 360 degrees. In the cartesian coordinate system, degrees are measured starting from the rightmost edge of the circle.

Radians are a unit that measure angle using the radius of a circle. One radian is equal to the amount of rotation required to travel the length of one radius along the circumference of the circle.