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Definition
is the endpoint of the rays that form an angle 


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Definition
negates both the hypothesis and the conclusion of the converse 


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Definition
is represented by a flat surface that extends without end and has no thickness 


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Definition
is formed by two rays with the same endpoint 


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exchanges the hypothesis and the conclusion 


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Definition


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Definition
the opposite of the statement 


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Definition


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Definition


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Definition
is an accepted statement of fact 


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Definition
an example that shows that a conjecture is incorrect 


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Definition
two angles whose sides are opposite rays 


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Definition
the real number that corresponds to a point 


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Definition
have the same truth value 


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Definition
is part of a line that consists of one endpoint and all the points of the line on one side of the endpoint 


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Definition


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Definition
a pair of adjacent angles whose noncommon sides are opposite rays. 


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Definition
points that are on the same line 


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two angles whose measures have a sum of 180. 


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is represented by a straight path of points that extends in two opposite directions without end and has no thickness 


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Definition
two coplanar angles with a common side, a common vertex , and no common interior points. 


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a conclusion you reach using inductive reasoning 


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Definition
reasoning based on patterns you observe 


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Definition
is part of the line that consists of two endpoints and all the points between them 


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Definition
negates both the hypothesis and conclusion of the conditional 


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Definition
indicates a location and has no size 


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Definition
lists each statement on the left. The justification, or the reason for each statement, is on the right. 


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Definition
a line that you add to a diagram to help explain relationships in proofs 


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Definition
noncoplanar; they are not parallel and do not intersect 


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Definition
a single true statement that combines a true conditional and its true converse. 


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Definition
the process of reasoning logically from given statements or facts to a conclusion. 


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Definition
lie on the same side of the transversal t and in corresponding positions 


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Definition
planes that do not intersect 


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sameside interior angles 

Definition
interior angles that lie on the same side of the transversal 


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alternate interior angles 

Definition
nonadjacent interior angles that lie on opposite sides of the transversal 


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Definition
a convincing argument that uses deductive reasoning. 


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Definition
coplanar lines that do not intersect 


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alternate exterior angles 

Definition
nonadjacent exterior angles that lie on opposite sides of the transversal 


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Definition
a line that intersects two or more coplanar lines at distinct points 


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exterior angle of a polygon 

Definition
an angle formed by a side and an extension of an adjacent side 


Term

Definition
allows you to state a conclusion from two true conditional statements when the conclusion of one statement is the hypothesis of the other statement. 

