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data
Gathered information.
decimal number
The numbers in the base 10 number system,
having one or more places to the right of
a decimal point.
decimal point
A symbol (looking exactly like a period) used
to separate the whole number part (on the
left) from the fractional part (on the right).
degree
A unit of measure of an angle.
denominator
The bottom part of a fraction.
density
Mass per unit volume of a substance.
dependent events
Two events in which the outcome of the second
is influenced by the outcome of the first.
dependent system
The equations of a system are dependent if
all the solutions of one equation are also
solutions of the other equation.
depreciation
A decrease in value.
diagonal
A line segment connecting two nonadjacent
vertices in a polygon.
diagram
A figure, usually a line drawing, that illustrates
a geometrical theorem.
diameter
A line segment joining two points on a circle
and passing through the center of the circle.
difference
The result of subtracting two numbers.
digit
The ten symbols, 0, 1, 2, 3, 4, 5, 6, 7, 8,
and 9. The number 215 has three digits: 2,
1, and 5.
dilatation
The enlargement or reduction of a plane figure.
dimension
A facet, aspect, or side of an object.
directrix
A fixed line associated with a parabola.
distance
Length, as between two points.
distributive property
a(b+c)=ab+ac
divide
To perform the operation of division.
dividend
In a/b=c, a
is the dividend.
divisible
Capable of being evenly divided by a number,
without a remainder.
division
The process of dividing two numbers.
divisor
In a/b=c, b
is the divisor.
domain
The set of all first coordinates in a function.
double
To multiply by 2; determine twice as much.
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