An "Algebraic Number" is a real number that is the solution to some polynomial equation with integer coefficients. This includes all the rational numbers, as well as square roots, cube roots, etc., and combinations of those.

It is known that $\pi$ and $e$ are not algebraic numbers - they are transcendental numbers.

AbsoluteValue Adding2DVectors AddingVectors ArgandDiagram CauchySequence ComplexConjugate ComplexNumber ComplexPlane ContinuedFraction ContinuumHypothesis CubeRoot DedekindCut DifferenceOfTwoSquares DividingComplexNumbers DividingRealNumbers Divisor FundamentalTheoremOfAlgebra GeorgCantor ImaginaryNumber Integer IrrationalNumber Logarithm MagnitudeOfAVector MultiplyingRealNumbers NewUserIntroduction NewtonsMethod PolarRepresentationOfAComplexNumber Quaternion RationalNumber RiemannHypothesis RootsOfPolynomials SubtractingRealNumbers TranscendentalNumber UncountableSet	AddingRealNumbers Function SquareRoot			FermatNumber ImageOfAFunction InverseFunction SquareNumber
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RealNumber			DomainOfAFunction MathematicsTaxonomy TypesOfNumber
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		⇌	You are here AlgebraicNumber
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			CubeRoot Integer Polynomial RationalNumber SquareRoot TranscendentalNumber
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ContinuedFraction DedekindCut	CauchySequence IrrationalNumber			CoDomainOfAFunction ComplexNumber CountableSet Denominator DomainOfAFunction Function FundamentalTheoremOfAlgebra ImageOfAFunction ImaginaryNumber Numerator Pythagoras ReducingFractionsToLowestTerms RiemannSurface Root RootTwoIsIrrational RootsOfPolynomials WholeNumber

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Algebraic Number