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20
Mathematics
10th Grade
09/12/2011

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Term
Acute Angle
Definition
An angle ith a degree measure less than 90
Term
Adjacent angles
Definition
2 angles that lie in the same plane, have a common vertex and a common side, but no common interior points
Term
Angle
Definition
The intersection of two noncollinear rays at a common endpoint
Term
angle bisector
Definition
a ray that divides an angle into two congruent angles
Term
Collinear
Definition
Points that lie on the same line
Term
Complementary Angles
Definition
Two angles with measures that have a sum of 90
Term
COngruent
Definition
havingthe same measure
Term
coplanar
Definition
points that lie in the same plane
Term
Line Segment
Definition
A measurable part of a line that consists of two points, endpoints, and all of the points between them.
Term
Linear pair
Definition
A pair of adjacent angles whose noncommon sides are opposite rays
Term
MIdpoint
Definition
the point halfway between the endpoints of a segment
Term
obtuse angle
Definition
An angle with degree measure greater than 90 and less than
Term
Perimeter
Definition
the sum of the lengths of the sides of a polygon
Term
Perpendicular lines
Definition
in a triangle, a line, segment, or ray that passes though the midpoint of a side and is perpendicular to the side.
Term
Polygon
Definition
a closed figure formed by a finite(?) number of coplanar segments called sides such that following conditions are met.
Term
Ray
Definition
RAY PQ is a ray if it is the set of points consisting of RAY PQ and all points S for which Q is between P and S.
Term
Right Angle
Definition
An angle with a degree measure of 90
Term
segment bisector
Definition
a segment line or plane that intersects a segment at its midpoint
Term
Supplementary Angles
Definition
2 angles with measures that have a sum of 180
Term
Vertical angles
Definition
2 non adjacent angles formed by 2 intersecting lines
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