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EnchantedLearning.com Math Dictionary

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G is for ...

GAUSS, J. C F. Johann Carl Friedrich Gauss (April 30, 1777-Feb. 23, 1855) was a great German mathematician, physicist, and astronomer. Gauss did important work in number theory, analysis, differential geometry, statistics, magnetism, and the theory of the motion of planetoids.

GCF The Greatest Common Factor (GCF) [also called the Greatest Common Divisor or GCD] is the largest positive integer that is a factor of two or more numbers. For example, the GCF of 14 and 21 is 7. It can be written GCF(14, 21) = 7.

GCD The Greatest Common Divisor (GCD) is another was of writing the Greatest Common Factor (GCF).

geometry Geometry is the mathematical study of points, lines, angles, and solids.

globe A globe is a small, spherical model of the Earth.

Goldbach's Conjecture Goldbach's Conjecture states that every even integer greater than 2 can be exressed as the sum of two prime numbers. It was first noticed by the mathematician Christian Goldbach in 1742. It has yet to be proven.

GOOGOL A googol is the number 10100 (10 raised to the 100th power or 1 followed by 100 zeros= 10,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000). A googol is much larger than the number of atoms in the Universe.

GOOGOLPLEX A googolplex is the number 10 raised to the google power: 10(googol) or 1010100 (1 followed by a googol of zeros). A googolplex is much larger than the number of atoms in the Universe.

golden ratio The golden ratio is (1 + 5e.5)/2 = 1.61803399. Many people say that a rectangle with the heigth to width ratio being the golden ratio is a pleasing shape.

graph A graph is a diagram that shows relationships between things.

great circle A great circle is an imaginary circle on the surface of a sphere whose plane passes through the center of the sphere.

> greater than The mathematical symbol > means "greater than." When one number is greater than a second number, the first one is bigger than the second. For example, 4 is greater than 2, or 4 > 2.

GCF Greatest Common Factor The Greatest Common Factor (GCF) is the largest positive integer that is a factor of two or more numbers. For example, the GCF of 14 and 21 is 7. It can be written GCF(14, 21) = 7.

GCD Greatest Common Divisor The Greatest Common Divisor (GCD) is another was of writing the Greatest Common Factor (GCF).

Greek Alphabet The Greek alphabet has 24 lettters, alpha, beta, gamma, delta, epsilon, zeta, eta, theta, iota, kappa, lambda, mu, nu, xi, omicron, pi, rho, sigma, tau, upsilon, phi, chi, psi, and omega. The Bayer system in astronomy uses Greek letters to denote stars by their relative brightness in each constellation (in order of decreasing brightness). The brightest star in a constellation is alpha, the second-brightest is beta, the third is gamma, etc.

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EnchantedLearning.com Math Dictionary

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Counting

Addition

Subtraction

Multiplication

Division

Number Line

Fractions

Decimals

Graphs

Measurement

Rounding

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