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Vocabulary Lessons 1-45
Saxon Math
25
Mathematics
5th Grade
01/08/2009

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Term
common denominator
Definition
denominators that are the same
Term
International System of Units
Definition
an international system of measurement in which units are related by a power of ten; also called metric.
Term
metric system
Definition
an international system of measurement in chich units are related by a power of ten; also called ISU
Term
U.S. Customary System
Definition
a system of measurement commonly used in the United States
Term
parallelgram
Definition
a quadrilateral that has two pairs of parallel sides
Term
rectangle
Definition
a quadrilateral that has four right angles
Term
rhombus
Definition
a parallelogram with all four sides of equal length
Term
square
Definition
a rectangle with all four sides of equal length
Term
intersecting lines
Definition
lines that cross
Term
trapezium
Definition
a quadrilateral with no parallel sides
Term
trapezoid
Definition
a quadrilateral with exactly one pair of parallel sides
Term
intersect
Definition
to share a point or points
Term
oblique lines
Definition
lines in the same plane that are neither parallel nor perpendicular
Term
parallel lines
Definition
lines that stay the same distance apart; lines that do not cross
Term
perpendicular lines
Definition
two lines that intersect at right angles
Term
acute angle
Definition
an angle whose measure is more than 0 degrees and less than 90 degrees
Term
angle
Definition
the opening that is formed when two lines, line segments, or rays intersect
Term
congruent
Definition
having the same size and shape
Term
obtuse angle
Definition
an angle whose measure is more than 90 degrees and less than 180 degrees
Term
plane
Definition
a flat surface that has no boundaries
Term
polygon
Definition
a closed, flat shape with straight sides
Term
quadrilateral
Definition
any four-sided polygon
Term
right angle
Definition
an angle that forms a square corner and measures 90 degrees
Term
side
Definition
a line segment that is part of a polygon
Term
similar
Definition
having the same shape but not necessarily the same size; proportional
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