# Math Dictionary g

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G

Geometric inequality A statement in geometry which indicates that quantity is greater than another quantity.

Geometric mean The geometric mean, also called the mean proportional, of two numbers a and b is the square root of their product. If a mm b= then m is the geometric mean of a and b .
Geometric probability A probability based on geometric relationships such as area, surface area or volume.

Geometric representation of the circular functions The representation of circular functions on a circle of unit radius. The trigonometric functions are called circular functions because their values are related to the lengths of specific line segments associated with a circle of unit radius.

Geometric sequence (A2T) A set of terms in which each term is formed by multiplying the preceding term by a nonzero constant.

Geometry Branch of mathematics that deals with the properties, measurement, and relationships of points, lines, angles, surfaces, and solids.

Glide reflection A transformation that is the composition of a line reflection and a translation through a vector parallel to that line of reflection.

Golden ratio: When a line segment AB is divided by an interior point P such that AB AP, AP, PB = , the ratio 1 (1 5)2 AB AP = + is called the golden ratio.

Golden rectangle : A rectangle whose adjacent sides have a ratio equal to the golden ratio.

Googol : Is the number written as 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
In Scientific Notation it is 1 × 10100

Gradient : How steep a straight line is.

Gram : A metric unit of mass (weight).
1,000 grams = 1 kilogram

Greater : Bigger.The symbol > means greater than (the symbol < means less than).

Greatest Common Factor : The highest number that divides exactly into two or more numbers. Abbreviated "GCF". Also called "Highest Common Factor".

Gross : Wages or salary before deductions for taxes and other purposes.

Graphical representation A graph or graphs used to model a mathematical relationship.

Great circle The intersection of a sphere with any plane passing through the center of the sphere.

Math dictionary g

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