| A | B |
|---|
| Point | A location in space |
| Line | A straight arrangements of point that extend forever in both directions |
| Plane | A flat surface that extends forever |
| Collinear Points | Points that lie on the same line |
| Coplanar Points | Points that lie on the same plane |
| Space | Set of all points |
| Line Segment | Consists of two endpoints and all the points in between |
| Ray | A part of a line containing one endpoint |
| Congruent Figures | Two figures that have the exact same size and shape |
| Right Angle | An angle with measure of 90 degrees |
| Acute Angle | An angle with measure less then 90 degrees |
| Obtuse Angle | An angle with measure greater then 90 degrees |
| Midpoint | A point that divides a segment into two congruent segments |
| Angle Bisector | Divides an angle into two congruent angles |
| Parallel Lines | Two or more lines in the same plane that do not intersect |
| Skew Lines | Two or more lines in Different planes that do not intersect |
| Perpendicular Lines | Two lines that intersect to form a right angle |
| Complementary Angles | Two angles whose measure have the sum of 90 degrees |
| Supplementary Angles | Two angles whose measure have the sum of 180 degrees |
| Vertical angles | 2 opposite angles formed by 2 lines. |
| Linear Pair | 2 adjacent angles that form a straight line |
| Polygon | A closed geometric shape formed by straight llines |
| Convex Polygon | A polygon that does not "Cave" |
| Concave Polygon | A polygon that "Caves" |
| Perimeter | The sum of the lengths of the sides |
| Diagonals | A line connecting 2 nonconsecutive vertices of a polygon |
| Equilateral Polygon | All sides are congruent |
| Equiangular Polygon | All angles are congruent |
| Regular Polygon | All sides and All angles are congruent |
| Triangle | 3 sided figure |
| Quadrilateral | 4 sided figure |
| Pentagon | 5 sided figure |
| Hexagon | 6 sided figure |
| Right Triangle | A triangle with one right angle |
| Acute Triangle | A triangle with all angles less then 90 degrees |
| Obtuse Triangle | A triangle with one side greater then 90 degrees |
| Scalene Triangle | A triangle with NO congruent sides |
| Isosceles Triangle | A triangle where 2 sides are congruent |
| Median | A segment drawn from one vertex to the midpoint of the opposite side |
| Altitude | A segment drawn from one vertex perpendicular to the opposite side |
| Trapezoid | A quadrilateral with exactly one pair of parallel lines |
| Rectangle | A parallelogram with opposite sides congruent |
| Parallelogram | Quadrilateral with opposite sides parallel. |
| Square | A parallelogram with all sides congruent |
