Chapter 1
Has one dimension It is represented by a line with to Arrowheads, but it extends without end
Line
AB is a ray if it consist of the endpoint A and all points on AB that lie on the same side of A as B
Ray
The common endpoint of two rays
Vertex
Lines that never intersect and they are coplanar, in the same plane
Parallel Lines
Angles on opposite sides of the line and inside the lines
Alternate Interior Angles
A flat surface that extends infinitely in all direction
Plane
Where two things cross and meet
Intersection
The "If" part of a conditional statement written in If-Then form
Hypothesis
A process that includes looking for patterns and making conjectures
Inductive Reasoning
Angles on the same side of the lines and inside the lines
Consecutive Interior Angles
Points that lie in the same plane
Coplanar Points
Where two rays meet as a common endpoint
Angle
Two angles whose measures have a sum of 90˚
Complementary Angles
A process that uses facts, definitions, accepted properties, and the lows of logic to form a logical argument
Deductive Reasoning
A function that moves or change a figure in some way to produce a new figure
Transformation
Consists of two endpoints and all points between them
Segment
Points that represent the ends of a line segment or ray
Endpoints
The "Then" part of a conditional statement written in "If-Then" form
Conclusion
Lines that don't intersect and are not coplanar
Skew Lines
Angles on opposite sides of the lines and outside the lines
Alternate Exterior Angles
A location in space represented by a dot and has no dimension
Point
The point that divides a segment into two congruent segments
Midpoint
Two Angles whose measures have a sum of 180˚
Supplementary Angles
A specific case for which a conjecture is false
Counterexample
A line that cuts through two other lines
Transversal