FORMULABANK

In a right triangle, the right angle is always labeled C.
Moving clockwise, the next angle is labeled A, followed by angle B.
The sides are named based on the opposite angle.
Side c is opposite angle C.
Side a is opposite angle A.
Side b is opposite angle B.

The two shorter sides (a and b) are called the legs (or catheti).
The longest side (c) is called the hypotenuse.

Sides are always written in lowercase letters (e.g., abc).
Angles are always written in uppercase letters (e.g., ABC).