Adjacent is an adjective meaning contiguous, adjoining or abutting. It and its noun form adjacency have several different technical meanings in mathematics: *, said of two vertices that are the endpoints of an edge in a graph *Adjacent angles, two angles that shares a common ray *, the side (or cathetus) of a right triangle that touches a given non-right angle. Similarly the adjacent angle of a given side in a right triangle is the non-right angle that touches the side. *, a side that shares an angle with another given side *Adjacency matrix, a matrix that represents a graph ;Other uses: * Adjacent channel in broadcasting, a channel that is next to another channel
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