# Adjacent Side (Triangle) Definition

In geometry, an adjacent side of the triangle is defined as the side located next to the given angle. It is also known as the non-hypotenuse side.

In general, these adjacent triangle sides are formed next to an angle and contains more than one side, but in the case of a right-angle triangle, a single adjacent side is formed between the angle and right angle, as shown in the below image.

**Note:**

If you want to know about adjacent faces, you can use our Adjacent Faces Definition.