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Chapter 1.1-1.5 Vocab.
N/A
35
Mathematics
10th Grade
01/25/2011

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Term
undefined term
Definition
can only be explained using examples and descriptions.
Term
point
Definition
a location
Term
line
Definition
infinite, made up of points and has no thickness or width.
Term
plane
Definition
a flat surface made up of points.
Term
collinear
Definition
points that make up a line.
Term
coplanar
Definition
points that lie in the same plane.
Term
intersection
Definition
a point where 2 or more lines join.
Term
definition/defined terms
Definition
terms explained using undefined terms and/or other defined terms.
Term
space
Definition
a boundless, 3D set of all points.
Term
line segment
Definition
part of a line with 2 endpoints.
Term
betweenness of points
Definition
relationship in which there is a real number between 2 real numbers.
Term
between
Definition
Term
congruent segment
Definition
segments that have the same measures.
Term
construction
Definition
methods of creating figures without measuring tools.
Term
distance
Definition
the length of the segment with 2 points as its endpoints.
Term
midpoint
Definition
the point halfway between the endpoints of the segment.
Term
segment bisector
Definition
any segment, line, or plane that intersects a segment at its midpoint.
Term
ray
Definition
a part of a line.
Term
opposite rays
Definition
when you choose a point on a line,determining two rays.
Term
angle
Definition
formed by two noncolinnear rays that have a common endpoint.
Term
side
Definition
rays that form an angle.
Term
vertex
Definition
common endpoint of the angle
Term
interior
Definition
inside of an angle.
Term
exterior
Definition
outside of an angle.
Term
degree
Definition
units used to measure angles.
Term
right angle
Definition
90
Term
acute angle
Definition
less than 90
Term
obtuse angle
Definition
more than 90
Term
angle bisector
Definition
ray that divides an angle into 2 congruent angles.
Term
adjacent angles
Definition
two angles that lie on the same plane and have a common vertex and side, but no common interior points.
Term
linear pair
Definition
a pair of adjacent angles with noncommon sides that are opposite rays.
Term
vertical angles
Definition
two nonadjacent angles formed by two intersecting lines.
Term
complementary angles
Definition
two angles with measures that have a sum of 90.
Term
supplementary angles
Definition
two angles with measures that have a sum of 180.
Term
perpendicular
Definition
lines, segments, or rays that form right angles.
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