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Math Definitions
TEST
17
Mathematics
9th Grade
09/02/2010

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Term
Altitude
Definition
distance from a vertex to the opposite side of a triangle
Term
Median
Definition
segment who's endpoints are a vertex and a midpoint
Term
Circumcenter
Definition
the point of concurrency of the three perpendicular bisectors of a triangle
Term
Orthocenter
Definition
the point of concurrency of the 3 altitudes of a triangle
Term
Incenter
Definition
the point of concurrency of the three angle bisectors of a triangle
Term
Perpendicular bisector
Definition
a perpendicular line that passes through a segments midpoint
Term
Midpoint
Definition
a point that divides a segment into two congruent segments
Term
Bisector
Definition
a line, segment, ray, or plane that passes through a midpoint or divides an angle into two congruent angles
Term
Line
Definition
infinite number of points that extend infinitly in two directions
Term
Point
Definition
a specific location in space
Term
Plane
Definition
an infinite number of points that extend in infinite directions
Term
Ray
Definition
a piece of a line with only one endpoint
Term
Opposite Rays
Definition
if you have 3 collinear points then you have opposite rays which is the same as a straight angle
Term
Concurrent
Definition
two or more things that intersect at a point
Term
Centroid
Definition
the point of concurrency of the medians
Term
Adjacent
Definition
common vertex, common ray, and no common interior points
Term
Linear Pair
Definition
a pair of opposite rays and another ray that give you a pair of adjacent angles
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