Diagonal (disambiguation)

A diagonal is a line segment joining two vertices of a polygon.

Diagonal may also refer to:

A stand of basic scaffolding on a house construction site, with diagonal braces to maintain its structure

• Diagonal brace, a beam used to brace a rectangular structure (such as scaffolding) to withstand strong forces pushing into it
• Diagonal pliers, wire-cutting pliers whose cutting edges intersect the joint rivet "on a diagonal"
• Diagonal lashing, a type of lashing used to bind spars or poles together so that the lashings cross over the poles at an angle
• Diagonal system of control, the method referees and assistant referees use to position themselves in one of the four quadrants of an association football pitch
• Main diagonal, the entries of a matrix whose row and column indices are the same
• Diagonal matrix, a matrix whose entries off the main diagonal are all zero
• Avinguda Diagonal, a street in Barcelona
• Diagonal (newspaper), a Spanish newspaper