| A | B |
|---|
| distance and midpoint formulas | can be used only with a line segment |
| slope formula | can be used with a line segment or a line |
| midpoint formula | the only formula where the x values are added and the y values are added |
| distance formula | uses a radical |
| length of a vertical segment | the absolute value of the difference of the ordinate values |
| vertical line | undefined slope |
| horizontal line | zero slope |
| example of a line with undefined slope | x = 12 |
| example of a line with zero slope | y = -2 |
| slope-intercept form of a line | y = mx + b |
| y-intercept | point at which a graph intersects the y-axis |
| used to find the endpoint of a segment | midpoint formula |
| used to show that lines are perpendicular | slope formula |
| used to show that segments are congruent | distance formula |
| used to separate a segment into four congruent segments | midpoint formula |
| slopes are equal | lines/segments are parallel |
| slopes are opposite reciprocals | lines/segments are perpendicular |
| segments share the same midpoint | the segments bisect each other |
| The distance formula is | an application of Pythagoras' theorem. |
| line which is found in QI and QIII | has a positive slope. |
