# Definition:Triangle (Geometry)/Adjacent

< Definition:Triangle (Geometry)(Redirected from Definition:Adjacent (in Triangle))

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*This page is about adjacent in the context of triangle. For other uses, see adjacent.*

## Definition

The two sides of a triangle which form a particular vertex are referred to as **adjacent** to that angle.

Similarly, the two vertices of a triangle to which a particular side contributes are referred to as **adjacent** to that side.