Term | Definition |
Point | Represented by a dot, has no dimension. |
Plane | Two dimensions, any three points make a____. i.e.a floor or wall that extends forever. |
Angle Bisector | A ray that divides an angle into two congruent angles. |
Supplementary Angles | Two angles with a sum of 180 degrees. |
Complimentary Angles | Two angles with a sum of 90 degrees. |
Opposite Rays | 2 rays that extend in opposite directions. |
Vertical Angles | "Kissing fish." Angles that are across from each other are congruent. |
Line | One dimension, extends forever in both directions. Any two points make a ____. |
Angle | Two different rays (sides) with the same endpoint (vertex). |
Collinear Points | Points that lie on the same line. |
Coplanar Points | Points that lie on the same plane. |
Acute Angle | An angle that is less than 90 degrees. |
Right Angle | An angle that is 90 degrees. |
Obtuse Angle | An angle that is greater than 90 degrees and less than 180 degrees. |
Straight Angle | An angle that is 180 degrees. |
Ray | Extends forever in one direction. |
Line Segment | Contains two endpoints and all points in between. Represented by endpoints. |
Midpoint | Divides a line segment into two congruent line segments. |
Linear Pair | Two adjacent angles that make 180 degrees (sides are opposite rays). |
Congruent | Equal |
Segment Bisector | A point, ray, line, line segment, or plane that intersects the segment at its midpoint. |
Adjacent Angles | Two angles that share a common vertex and side, but have no common interior points. |