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  1. What is a Diagonal - Meaning, Examples | Diagonal Line

    A line segment joining one corner to another but is not an edge is called a diagonal. In other words, a diagonal is a line that connects the opposite vertices of a polygon. Learn the definition, formula, …

  2. Diagonal - Wikipedia

    In geometry, a diagonal is a line segment joining two vertices of a polygon or polyhedron, when those vertices are not on the same edge. Informally, any sloping line is called diagonal.

  3. Diagonal Definition (Illustrated Mathematics Dictionary)

    Illustrated definition of Diagonal: Generally means corner to corner. In Geometry: a line segment that goes from one corner to another, but...

  4. Flexi answers - What is a diagonal line? | CK-12 Foundation

    A diagonal line is a straight line that connects two non-adjacent corners of a shape, like a square or rectangle. It slants at an angle, rather than going straight up, down, or side to side.

  5. What Is A Diagonal Line? Definitions, Types & Calculations

    Jul 14, 2025 · A diagonal refers to a straight line that runs across the vertices of a polygon and links its opposing corners. In other terms, a polygon’s diagonal is a line segment that connects any two non …

  6. Diagonal Facts for Kids

    What is a Diagonal Line? A diagonal line connects two points that are not next to each other. For example, on a computer monitor, the size is often measured diagonally. This means measuring from …

  7. Diagonals - GeeksforGeeks

    Jul 24, 2025 · What are Diagonals? Diagonal is a straight line connecting opposite vertices of any polygon is called the diagonal of the polygon. The length of the diagonal of the polygon is always …

  8. What is a Diagonal Line? Definition and Examples - Twinkl

    What is a diagonal line in a shape? In geometry, a diagonal line is a straight line segment that joins two corners of a polygon, but is not an edge. It goes through the middle of the shape. It does not go …

  9. Diagonals - Interactive Mathematics

    A diagonal line is a line segment that connects two non-adjacent vertices of a shape. It is usually longer than other lines in the shape, and it usually follows a curved path.

  10. Diagonal

    A diagonal line is a straight line connecting two corners (or vertices) of a polygon that are not next to each other. The polygon in question must have 4 or more vertices.