__G__

**Geometric
construction ** A geometric
drawing for which only a compass and a straightedge may be used.

**Geometry
**The study of space

**Goldbach's
conjecture **A conjecture (or guess) made by Goldbach in 1742 stating that any
even number greater

than
four can be written as the sum of two odd primes.

**Gram
**The unit of measure for mass in the metric system

**Graph
of a number ** The point on
the number line paired with the number.

**Graph
of an equation ** 0 The line
consisting of all points whose coordinates satisfy the equation.

**Greatest
common divisor **The greatest common divisor of two or more fractions is the
largest number which will

divide
each of the given fractions a whole number of times

**Greatest
common factor **The largest number which is a factor of both or all of two or
more counting numbers

**Greatest
possible error **Half the unit used to measure

**Grouping
symbols ** Symbols such as
parentheses,( ), and brackets, [], that are used to group expressions.