| A | B |
|---|
| Point | A location in space represented by a dot |
| Line | A set of many points that extends with no end in opposite directions |
| Collinear Points | Three or more points that line in a straight line |
| Noncollinear Points | Points that do NOT lie in a straight line |
| Coplanar Points | Points that lie in the same plane |
| Noncoplanar Points | Points that lie in different planes |
| Line Segment | A part of a line that consists of two points and the points between them |
| Endpoints | points that represent the starting point of a ray or ends of a segment |
| Ray | A part of the line that starts at one endpoint and extends endlessly in one direction |
| Angle | A figure formed by two rays that have the same endpoint |
| Sides of an Angle | the two rays that form an angle |
| Vertex of an Angle | The point at which the sides of an angle meet |
| Intersecting Lines | two lines that cross at exactly one point |
| Parallel Lines | Lines in the same plane that do not intersect |
| Right Angle | An angle with a measure of 90 degrees |
| Perpendicular Lines | Lines that meet at right angles |
| Vertical Angles | Pairs of angles formed by lines that intersect |
| Transversal | A line that intersects two or more lines |
| Interior Angles | Angles that are enclosed between two parallel lines crossed by a transversal |
| Exterior Angles | Angles that lie outside two lines crossed by a transversal |
| Alternate Interior Angles | Angles that lie on opposite sides of a transversal and are enclosed between two lines |
| Alternate Exterior Angles | Two exterior angles that lie on opposite sides of a transversal and are outside two lines |
| Adjacent Angles | two angles who share one vertex and one side |
| Linear Pairs | Two adjacent angles whose noncommon sides form a straight line |
| Intersecting Planes | Planes that meet in one line |
| Parallel Planes | Planes that do not intersect |
| Skew Lines | Lines that doe not intersect and and are not in the same plane |
| Half Plane | part of a plane made up of one line called the edge and all points on one side of the edge |
