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Glossary Math & Statistics

Vector

A vector is a quantity with both a size and a direction, written as a list of components such as (3, 4).

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In more detail

The length of (3, 4) is √(3² + 4²) = 5. The dot product of two vectors multiplies matching components and adds them, and tells you how aligned they are.

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Calculate the sum, difference, dot product, cross product, magnitudes, unit vectors, angle and projection of two 2D or 3D vectors.

See also

  • Glossary Matrix
    A matrix is a rectangular grid of numbers used to represent linear equations, transformations and data.
  • Glossary Pythagorean theorem
    In a right triangle the square of the hypotenuse equals the sum of the squares of the other two sides: `a² + b² = c²`.
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