Glossary · G
Geometric mean
The number that stands to the larger as the smaller stands to it: √(ab). For 6 and 12 it is about 8.49: irrational, and found by construction.
See also: Arithmetic mean, Harmonic mean
Rules that use the word
The three means. Between two numbers a and b, find the arithmetic mean (a + b)/2, the geometric mean √(ab) and the harmonic mean 2ab/(a + b); use them to find a third dimension that belongs to the other two.
Nearby in the glossary
Gardenesque · Gargoyle · Gavaksha · Geodesic dome · Geometric tracery · Gerberette · Giant order · Giardino segreto