compatible numbers Numbers that are easy to
compute with mentally. (p. 193)
complementary angles Two angles whose
measures have a sum of 90°. Each angle is
said to be the complementof the other. (p. 334)
complex fraction A fraction having one or
more fractions in the numerator, denominator,
or both. (p. 287)
composite number A whole number greater
than 1 that has more than two factors. (p. 180)
compound event In probability, when one
event follows another. (p. 276)
cone A solid, or space, figure with one circular
base, one vertex, and a curved surface.
(p. 362)
congruent figures Figures that have the same
size and shape. (p. 354)
conjunction A compound statement formed by
joining two statements with the connective and.
(p. 491)
coordinate plane The plane formed by two
perpendicular number lines. (p. 502)
corresponding angles A pair of nonadjacent
angles, one interior and one exterior, that
are both on the same side of the transversal.
(p. 336)
corresponding parts Matching sides or angles
of two figures. (p. 354)
cross products The products obtained by
multiplying the numerator of one fraction by
the denominator of a second fraction and the
denominator of the first fraction by the
numerator of the second fraction. (p. 382)
cross section A plane figure formed when a
plane cuts through a solid figure. (p. 364)
cumulative frequency A running total of the
number of data surveyed. (p. 298)
cumulative frequency table A summary of a
data set in which each data value is paired with
the sum of the frequencies of all values less
than or equal to it. (p. 298)
customary system The measurement system
that uses inch, foot, yard, and mile; fluid ounce,
cup, pint, quart, and gallon; ounce, pound, and
ton. (See Table of Measures,p. 564)
D
data Facts or information. (p. 298)
decagon A polygon with ten sides. (p. 342)decimal A number with a decimal point
separating the ones from the tenths place.
(p. 34)
degree (°) A unit used to measure angles; a unit
used to measure temperature on the Celsius
(°C) or the Fahrenheit (°F) scale. (pp. 166, 330)
dependent events In probability, when the
second event is affected by the first. (p. 277)
diagonal A line segment, other than a side, that
joins two vertices of a polygon. (p. 342)
diameter A line segment that passes through
the center of a circle and has both endpoints
on the circle. (p. 352)
discount A reduction on the regular, or list,
price of an item. (p. 426)
disjunction A compound statement formed by
joining two statements with the connective or.
(p. 491)
Distributive Property Multiplying a number by
a sum is the same as multiplying the number
by each addend of the sum and then adding
the products. (p. 70)
divisible A number is divisible by another
number if the remainder is 0 when the number
is divided by the other number. ( p. 178)
Division Property of Equality If both sides of
an equation are divided by the same nonzero
number, the sides remain equal. (p. 134)
divisor The number by which the dividend is
divided. (p. 88)
double bar (line) graph A graph that uses pairs
of bars (line segments) to compare two sets of
data. (pp. 310, 312)
E
edge The line segment where two faces of a
space figure meet. (p. 362)
endpoint The point at the end of a line segment
or ray. (p. 338)
equally likely outcomes In probability, when
the chance is the same of getting any one of
the desired outcomes. (p. 274)
equation A statement that two mathematical
expressions are equal. (p. 128)
equilateral triangle A triangle with three
congruent sides and three congruent angles.
(p. 344)
equivalent fractions Different fractions that
name the same amount. (p. 184)5478206-2_546-552 1/26/06 3:45 PM Page 547