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Tools of Geometry
Basic Vocabulary of Geometry
27
Mathematics
10th Grade
08/25/2016

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Cards

Term
adjacent angles
Definition
two coplanar angles with a common side, a common vertex, and no common interior points
Term
linear pair
Definition
a pair of adjacent angles who non common sides are opposite rays
Term
postulate or axiom
Definition
an accepted statement of fact
Term
vertex
Definition
common endpoint of the rays of the angle
Term
coplanar
Definition
points and lines that lie on the same plane
Term
congruent angles
Definition
angles that have the same measure
Term
diagonal
Definition
a segment that connects two nonconsecutive vertices
Term
angle
Definition
formed by two rays with the same endpoints
Term
segment
Definition
part of a line that consists of two endpoints and all points between them
Term
concave polygon
Definition
a polygon with at least one diagonal with points in the exterior of the polygon
Term
line
Definition
represented by a straight path that extends in two opposite directions without end and no thickness
Term
opposite rays
Definition
two rays that share the same endpoint and form a line
Term
straight angle
Definition
an angle that has a measure of 180 degrees
Term
ray
Definition
part of a line that consists of one endpoint and all the points of the line on one side of the endpoint
Term
obtuse angle
Definition
an angle that has a measure between 90 and 180 degrees
Term
point
Definition
indicates a location and has no size
Term
supplementary angles
Definition
two angles who measures have a sum of 180 degrees
Term
collinear points
Definition
points that lie on the same line
Term
convex polygon
Definition
a polygon that has no diagonal with points in the exterior the polygon
Term
congruent segments
Definition
segments that have the same length
Term
vertical angles
Definition
two angles whose sides are opposite rays
Term
complementary angles
Definition
two angles whose measures have a sum of 90 degrees
Term
midpoint
Definition
point that divides a segment into two congruent segments
Term
angle bisector
Definition
a ray that divides an angle into two congruent angles
Term
plane
Definition
represented by a flat surface that extends without end and has no thickness
Term
right angle
Definition
an angle that has a measure of 90 degrees
Term
acute angle
Definition
an angle that has a measure between 0 and 90 degrees
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