488isosceles triangle A triangle with at least
two sides that are equal in length.
K
kilogram (kg) A metric unit of mass;
1 kg1000 g.
kilometer (km) A metric unit of distance;
1 km1000 m.
L
least common denominator (LCD) The
least common multiple of two or more
denominators.
least common multiple (LCM) The least
number that is a multiple of two or more
numbers.
like denominators Denominators that are
the same in one or more fractions; the
fractions^37 and ^57 have like denominators.
line A straight set of points that goes on
forever in opposite directions.
line graph A graph that uses points on a
grid connected by line segments to
represent data.
line plot A graph of data on a number line.
line segment The part of a line between
two endpoints.
liter (L) A metric unit of capacity;
1 L1000 mL.
lowest terms (simplest form) A fraction is
in lowest terms when its numerator and
denominator have no common factor other
than 1.
M
mass The measure of the amount of matter
an object contains.
mean (average) A number derived by
dividing a sum by the number of its
addends.
median The middle number of a set of
numbers arranged in order.meter (m) A metric unit of length;
1 m 10 dm; 1 m 100 cm;
1000 m 1 km.
metric system The measurement system
that uses centimeter, decimeter, meter, and
kilometer; milliliter and liter; and gram and
kilogram.
mile (mi) A customary unit of distance;
5280 ft 1 mi; 1760 yd 1 mi.
milliliter (mL) A metric unit of capacity;
1000 mL 1 L.
millimeter (mm) A metric unit of length.
10 millimeters 1 centimeter.
minuend A number from which another
number is subtracted.
mixed number A number that is made up
of a whole number and a fraction.
1 ^12 mixed number
mode The number that appears most
frequently in a set of numbers.
multiple The product of a given number
and any whole number.
N
negative numbers Numbers that are less
than zero; 4 is a negative number.
net A flat pattern that folds into a solid
figure.
number line A line that is used to show the
order of numbers.
number sentence An equation or inequality.
16 9 7 28 52
numerator The numeral above the bar in a
fraction; it names the number of parts
being considered.
O
obtuse angle An angle that measures
more than 90°, but less than 180°.
octagon A polygon with eight sides.
one million The next counting number after
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