45 45 90 Triangle

The 45 45 90 special right triangle is defined by the three angles: 45, 45 and 90 degrees. Its simple geometry makes it useful in applications.
Figure 1: 45 45 90 Triangle

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

General Form

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

45 45 90 Degree Triangle

Radians System

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

Tau 8 Triangle

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