| A | B |
|---|
| Point | a location in space represented by a dot |
| Line | a set of many points that extend in opposite directions without ending |
| Collinear points | points on the same line |
| Line segment | a part of a line that has two end points |
| Ray | a part of a line with one endpoint |
| Acute angles | are angles that measure less than 90 degrees |
| Obtuse angles | are angles that measure greater than 90 degrees |
| Right angles | are angles that measure 90 degrees |
| Straight angles | are angles that measure 180 degrees |
| Vertical angles | share a common side and are opposites |
| Complementary angles | the sum of two angles that equal 90 degrees |
| Supplementary angles | the sum of two angles that equal 180 degrees |
| Angle bisector | cuts an angle into two equal parts |
| Parallel lines | lines in the same plance that never meet |
| Perpendicular lines | two lines that intersect to form a right angle |
| Transversal | a line that crosses parallel lines |
| Exterior angles | angles outside the parallel lines |
| Inteior angles | angles inside the parallel lines |
| Corresponding angles | pairs of angles that are in similar positions that form the letter "F" |
| Alternate interior angles | pairs of interior angles on opposite sides of the transversal that form the letter "Z" |
| Alternate exterior angles | pairs of exterior angles on opposite sides of a tranversal that form the letter "Z" |
