###
A Glossary of Mathematical Terms - G

####
Geometric mean

The geometric mean of two positive numbers *a* and
*b* is .

####
Geometric sequence (or progression)

A sequence of numbers where the first one is repeatedly
multiplied by a fixed number to obtain the following numbers of
the sequence. the fixed number is acalled the common ratio.

####
Glide reflection

A composite transformation where a figure is reflected and then
translated.

####
Golden rectangle

A rectangle where the ratio of its length to its width is .

####
Great circle

See Sphere.

####
Greatest Common Factor (G.C.F.)

Is the largest common factor betwen two or more numbers, that is
the largest numbers that divides all the given numbers.

####
Grid

A tessellation of congruent squares used in coordinate systems
or to measure distances, areas, etc.

copyright 2000 et seq. maddalena falanga & luciano battaia

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