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A Glossary of Mathematical Terms - Q

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Q.E.D.

Quod erat demonstrandum: at the end of a proof.

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Quadrangol

See Quadrilateral.

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Quadrant

The plane is divided into four parts by the axes. They are called
first, second, third and fourth quadrant.

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Quadratic equation

ax^{2} + bx + c = 0.

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Quadratic term of an equation

The second degree term of an equation.

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Quadrilateral

A four-sided polygon: Trapezium, Rhomboid, Rhombus, Trapezoid,
Rectangle, Square, Parallelogram.

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Quartile

Any one of the values in a frequency distribution that divides the
distribution in four parts of equal frequency.

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Quotient

See Division.

copyright 2000 et seq. maddalena falanga & luciano battaia

first published on september 01 2003 - last updated on september 01
2003